confres

.gitattributes

@@ -0,0 +1,63 @@
+###############################################################################
+# Set default behavior to automatically normalize line endings.
+###############################################################################
+* text=auto
+
+###############################################################################
+# Set default behavior for command prompt diff.
+#
+# This is need for earlier builds of msysgit that does not have it on by
+# default for csharp files.
+# Note: This is only used by command line
+###############################################################################
+#*.cs     diff=csharp
+
+###############################################################################
+# Set the merge driver for project and solution files
+#
+# Merging from the command prompt will add diff markers to the files if there
+# are conflicts (Merging from VS is not affected by the settings below, in VS
+# the diff markers are never inserted). Diff markers may cause the following 
+# file extensions to fail to load in VS. An alternative would be to treat
+# these files as binary and thus will always conflict and require user
+# intervention with every merge. To do so, just uncomment the entries below
+###############################################################################
+#*.sln       merge=binary
+#*.csproj    merge=binary
+#*.vbproj    merge=binary
+#*.vcxproj   merge=binary
+#*.vcproj    merge=binary
+#*.dbproj    merge=binary
+#*.fsproj    merge=binary
+#*.lsproj    merge=binary
+#*.wixproj   merge=binary
+#*.modelproj merge=binary
+#*.sqlproj   merge=binary
+#*.wwaproj   merge=binary
+
+###############################################################################
+# behavior for image files
+#
+# image files are treated as binary by default.
+###############################################################################
+#*.jpg   binary
+#*.png   binary
+#*.gif   binary
+
+###############################################################################
+# diff behavior for common document formats
+# 
+# Convert binary document formats to text before diffing them. This feature
+# is only available from the command line. Turn it on by uncommenting the 
+# entries below.
+###############################################################################
+#*.doc   diff=astextplain
+#*.DOC   diff=astextplain
+#*.docx  diff=astextplain
+#*.DOCX  diff=astextplain
+#*.dot   diff=astextplain
+#*.DOT   diff=astextplain
+#*.pdf   diff=astextplain
+#*.PDF   diff=astextplain
+#*.rtf   diff=astextplain
+#*.RTF   diff=astextplain

.gitignore

@@ -0,0 +1,364 @@
+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+##
+## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
+
+# User-specific files
+*.rsuser
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Mono auto generated files
+mono_crash.*
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+[Ww][Ii][Nn]32/
+[Aa][Rr][Mm]/
+[Aa][Rr][Mm]64/
+bld/
+[Bb]in/
+[Oo]bj/
+[Oo]ut/
+[Ll]og/
+[Ll]ogs/
+
+# Visual Studio 2015/2017 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# Visual Studio 2017 auto generated files
+Generated\ Files/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUnit
+*.VisualState.xml
+TestResult.xml
+nunit-*.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# Benchmark Results
+BenchmarkDotNet.Artifacts/
+
+# .NET Core
+project.lock.json
+project.fragment.lock.json
+artifacts/
+
+# ASP.NET Scaffolding
+ScaffoldingReadMe.txt
+
+# StyleCop
+StyleCopReport.xml
+
+# Files built by Visual Studio
+*_i.c
+*_p.c
+*_h.h
+*.ilk
+*.meta
+*.obj
+*.iobj
+*.pch
+*.pdb
+*.ipdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*_wpftmp.csproj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
+*.sdf
+*.cachefile
+*.VC.db
+*.VC.VC.opendb
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+*.sap
+
+# Visual Studio Trace Files
+*.e2e
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# AxoCover is a Code Coverage Tool
+.axoCover/*
+!.axoCover/settings.json
+
+# Coverlet is a free, cross platform Code Coverage Tool
+coverage*.json
+coverage*.xml
+coverage*.info
+
+# Visual Studio code coverage results
+*.coverage
+*.coveragexml
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# Note: Comment the next line if you want to checkin your web deploy settings,
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
+# NuGet Packages
+*.nupkg
+# NuGet Symbol Packages
+*.snupkg
+# The packages folder can be ignored because of Package Restore
+**/[Pp]ackages/*
+# except build/, which is used as an MSBuild target.
+!**/[Pp]ackages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/[Pp]ackages/repositories.config
+# NuGet v3's project.json files produces more ignorable files
+*.nuget.props
+*.nuget.targets
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Windows Store app package directories and files
+AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+*.appx
+*.appxbundle
+*.appxupload
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!?*.[Cc]ache/
+
+# Others
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.jfm
+*.pfx
+*.publishsettings
+orleans.codegen.cs
+
+# Including strong name files can present a security risk
+# (https://github.com/github/gitignore/pull/2483#issue-259490424)
+#*.snk
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+ServiceFabricBackup/
+*.rptproj.bak
+
+# SQL Server files
+*.mdf
+*.ldf
+*.ndf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+*.rptproj.rsuser
+*- [Bb]ackup.rdl
+*- [Bb]ackup ([0-9]).rdl
+*- [Bb]ackup ([0-9][0-9]).rdl
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+node_modules/
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
+*.vbw
+
+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# CodeRush personal settings
+.cr/personal
+
+# Python Tools for Visual Studio (PTVS)
+__pycache__/
+*.pyc
+
+# Cake - Uncomment if you are using it
+# tools/**
+# !tools/packages.config
+
+# Tabs Studio
+*.tss
+
+# Telerik's JustMock configuration file
+*.jmconfig
+
+# BizTalk build output
+*.btp.cs
+*.btm.cs
+*.odx.cs
+*.xsd.cs
+
+# OpenCover UI analysis results
+OpenCover/
+
+# Azure Stream Analytics local run output
+ASALocalRun/
+
+# MSBuild Binary and Structured Log
+*.binlog
+
+# NVidia Nsight GPU debugger configuration file
+*.nvuser
+
+# MFractors (Xamarin productivity tool) working folder
+.mfractor/
+
+# Local History for Visual Studio
+.localhistory/
+
+# BeatPulse healthcheck temp database
+healthchecksdb
+
+# Backup folder for Package Reference Convert tool in Visual Studio 2017
+MigrationBackup/
+
+# Ionide (cross platform F# VS Code tools) working folder
+.ionide/
+
+# Fody - auto-generated XML schema
+FodyWeavers.xsd
+/Epi2O365/appsettings.json

EPi2Exchange2.sln

@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.11.35327.3
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Epi2Exchange2", "Epi2O365\Epi2Exchange2.csproj", "{4D90F254-A69D-41CB-853D-77DE7DE56770}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{4D90F254-A69D-41CB-853D-77DE7DE56770}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4D90F254-A69D-41CB-853D-77DE7DE56770}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4D90F254-A69D-41CB-853D-77DE7DE56770}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4D90F254-A69D-41CB-853D-77DE7DE56770}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {E759632A-6321-4221-8A39-15C4E3DE0583}
+	EndGlobalSection
+EndGlobal

Epi2O365/ConfigLoader.cs

@@ -0,0 +1,91 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System;
+using System.IO;
+using System.Text.Json;
+
+namespace Epi2Exchange2
+{
+    public class ConfigLoader
+    {
+        public AzureAdConfig AzureAd { get; set; }
+        public GraphConfig Graph { get; set; }
+        public EpirentConfig Epirent { get; set; }
+
+        private static readonly string configFilePath = "appsettings.json";
+        private static ConfigLoader _instance;
+
+        // Singleton-Instanz für globale Nutzung
+        public static ConfigLoader Instance => _instance ??= LoadConfig();
+
+        public ConfigLoader() { }
+
+        /// <summary>
+        /// Lädt die Konfiguration aus der appsettings.json Datei
+        /// </summary>
+        public static ConfigLoader LoadConfig()
+        {
+            Logger.Info("Lade Konfigurationsdatei...");
+
+            try
+            {
+                if (!File.Exists(configFilePath))
+                {
+                    Logger.Error($"Konfigurationsdatei '{configFilePath}' wurde nicht gefunden!");
+                    throw new FileNotFoundException($"Config-Datei '{configFilePath}' wurde nicht gefunden!");
+                }
+
+                string json = File.ReadAllText(configFilePath);
+                var config = JsonSerializer.Deserialize<ConfigLoader>(json);
+
+                if (config == null)
+                {
+                    Logger.Error("Fehler: Konfiguration konnte nicht deserialisiert werden.");
+                    throw new Exception("Konfiguration konnte nicht geladen werden.");
+                }
+
+                Logger.Info("Konfiguration erfolgreich geladen.");
+                return config;
+            }
+            catch (Exception ex)
+            {
+                Logger.Error("Fehler beim Laden der Konfiguration!", ex);
+                throw;
+            }
+        }
+    }
+
+    /// <summary>
+    /// Azure AD Konfiguration (für Microsoft Graph API)
+    /// </summary>
+    public class AzureAdConfig
+    {
+        public string ClientId { get; set; }
+        public string TenantId { get; set; }
+        public string ClientSecret { get; set; }
+    }
+
+    /// <summary>
+    /// Microsoft Graph API Konfiguration
+    /// </summary>
+    public class GraphConfig
+    {
+        public string BaseUrl { get; set; }
+        public List<string> Users { get; set; }
+    }
+
+    /// <summary>
+    /// Epirent Konfiguration
+    /// </summary>
+    public class EpirentConfig
+    {
+        public string Server { get; set; }
+        public int Port { get; set; }
+        public string Token { get; set; }
+        public int Mandant { get; set; }
+
+    }
+}

Epi2O365/Epi2Exchange2.csproj

@@ -0,0 +1,34 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <Authors>Leopold Strobl</Authors>
+    <Company>VT-Media</Company>
+    <Title>Epirent to O365 Syncher</Title>
+    <Copyright>2025 VT-Media</Copyright>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="log4net" Version="3.0.3" />
+    <PackageReference Include="Microsoft.Graph" Version="5.69.0" />
+    <PackageReference Include="Microsoft.Identity.Client" Version="4.68.0" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+    <PackageReference Include="RestSharp" Version="112.1.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Update="appsettings.examples.json">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+    <None Update="appsettings.json">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+    <None Update="log4net.config">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
+</Project>

Epi2O365/EpiContacts.cs

@@ -0,0 +1,89 @@
+using Microsoft.Graph.Models.ExternalConnectors;
+using Microsoft.Kiota.Abstractions;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Threading.Tasks;
+using RestSharp;
+using Newtonsoft.Json;
+
+namespace Epi2Exchange2
+{
+    class EpiContacts
+    {
+        ConfigLoader Configuration = ConfigLoader.Instance;
+        RestClient epirentserver;
+        public EpiContacts()
+        {
+            epirentserver = new RestClient("http://" + Configuration.Epirent.Server + ":" + Configuration.Epirent.Port);
+        }
+
+
+        private String getContactJson()
+        {
+            RestRequest request = new RestRequest("/v1/contact/filter?ia=1&cl=" + Configuration.Epirent.Mandant, RestSharp.Method.Get);
+            request.AddHeader("X-EPI-NO-SESSION", "True");
+            request.AddHeader("X-EPI-ACC-TOK", Configuration.Epirent.Token);
+            request.RequestFormat = DataFormat.Json;
+            return epirentserver.ExecuteGet(request).Content;
+            
+        }
+        private String getContactDetailJson(long ContactPrimaryKey)
+        {
+            RestRequest request = new RestRequest("/v1/contact/"+ContactPrimaryKey+"/filter?ia=1&cl=" + Configuration.Epirent.Mandant, RestSharp.Method.Get);
+            request.AddHeader("X-EPI-NO-SESSION", "True");
+            request.AddHeader("X-EPI-ACC-TOK", Configuration.Epirent.Token);
+            request.RequestFormat = DataFormat.Json;
+           
+            return epirentserver.ExecuteGet(request).Content;
+
+        }
+        private String getContactPersonJson(long ContactPersonPrimaryKey)
+        {
+            RestRequest request = new RestRequest("/v1/cperson/" + ContactPersonPrimaryKey + "/filter?ia=1&cl=" + Configuration.Epirent.Mandant, RestSharp.Method.Get);
+            request.AddHeader("X-EPI-NO-SESSION", "True");
+            request.AddHeader("X-EPI-ACC-TOK", Configuration.Epirent.Token);
+            request.RequestFormat = DataFormat.Json;
+
+            return epirentserver.ExecuteGet(request).Content;
+
+        }
+
+        public Model.ContactList getContactList()
+        {
+            Model.ContactList contactList = JsonConvert.DeserializeObject<Model.ContactList>(getContactJson());
+            return contactList;
+        }
+
+        public Model.ContactList getContactList(DateTime FilterTime)
+        {
+            Model.ContactList contactList = JsonConvert.DeserializeObject<Model.ContactList>(getContactJson());
+
+            contactList.Payload.RemoveAll(p => p.getDateTimeChanged() < FilterTime);
+
+            return contactList;
+
+        }
+
+
+        public Model.ContactDetail GetContactDetail(long primaryKey)
+        {
+
+            Model.ContactDetail contactDetail = JsonConvert.DeserializeObject<Model.ContactDetail>(getContactDetailJson(primaryKey));
+            return contactDetail;
+        }
+
+        public Model.ContactPersonDetail GetContactPersonDetail(long primaryKey)
+        {
+
+            Model.ContactPersonDetail cPersonDetail = JsonConvert.DeserializeObject<Model.ContactPersonDetail>(getContactPersonJson(primaryKey));
+            return cPersonDetail;
+        }
+
+
+
+
+    }
+}

Epi2O365/Logger.cs

@@ -0,0 +1,27 @@
+using log4net.Config;
+using log4net;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Epi2Exchange2
+{
+    public static class Logger
+    {
+        private static readonly ILog log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+        static Logger()
+        {
+            var logRepository = LogManager.GetRepository(Assembly.GetEntryAssembly());
+            XmlConfigurator.Configure(logRepository, new FileInfo("log4net.config"));
+        }
+
+        public static void Info(string message) => log.Info(message);
+        public static void Warn(string message) => log.Warn(message);
+        public static void Error(string message, Exception ex = null) => log.Error(message, ex);
+        public static void Debug(string message) => log.Debug(message);
+    }
+}

Epi2O365/Model/ContactDetail.cs

@@ -0,0 +1,303 @@
+using Microsoft.Graph.Models;
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Epi2Exchange2.Model
+{
+    public partial class ContactDetail
+    {
+        [JsonProperty("success")]
+        public bool Success { get; set; }
+
+        [JsonProperty("namespace")]
+        public string Namespace { get; set; }
+
+        [JsonProperty("action")]
+        public string Action { get; set; }
+
+        [JsonProperty("templateSignature")]
+        public string TemplateSignature { get; set; }
+
+        [JsonProperty("payload_length")]
+        public long PayloadLength { get; set; }
+
+        [JsonProperty("is_send_payload")]
+        public bool IsSendPayload { get; set; }
+
+        [JsonProperty("payload")]
+        public List<ContactDetailPayload> Payload { get; set; }
+
+
+    }
+
+
+
+    public partial class ContactDetailPayload
+    {
+        [JsonProperty("primary_key")]
+        public long PrimaryKey { get; set; }
+
+        [JsonProperty("customer_no")]
+        public long CustomerNo { get; set; }
+
+        [JsonProperty("supplier_no")]
+        public long SupplierNo { get; set; }
+
+        [JsonProperty("is_single_person")]
+        public bool IsSinglePerson { get; set; }
+
+        [JsonProperty("name")]
+        public string Name { get; set; }
+
+        [JsonProperty("name1")]
+        public string Name1 { get; set; }
+
+        [JsonProperty("name2")]
+        public string Name2 { get; set; }
+
+        [JsonProperty("name3")]
+        public string Name3 { get; set; }
+
+        [JsonProperty("matchcode")]
+        public string Matchcode { get; set; }
+
+        [JsonProperty("is_interested")]
+        public bool IsInterested { get; set; }
+
+        [JsonProperty("is_customer")]
+        public bool IsCustomer { get; set; }
+
+        [JsonProperty("is_supplier")]
+        public bool IsSupplier { get; set; }
+
+        [JsonProperty("is_location")]
+        public bool IsLocation { get; set; }
+
+        [JsonProperty("is_vip")]
+        public bool IsVip { get; set; }
+
+        [JsonProperty("is_colleague")]
+        public bool IsColleague { get; set; }
+
+        [JsonProperty("salutation")]
+        public string Salutation { get; set; }
+
+        [JsonProperty("grade")]
+        public string Grade { get; set; }
+
+        [JsonProperty("notes_positive")]
+        public string NotesPositive { get; set; }
+
+        [JsonProperty("notes_negative")]
+        public string NotesNegative { get; set; }
+
+        [JsonProperty("date_of_birth")]
+        public string DateOfBirth { get; set; }
+
+        [JsonProperty("date_changed")]
+        public DateTime DateChanged { get; set; }
+
+        [JsonProperty("time_changed")]
+        public long TimeChanged { get; set; }
+
+        [JsonProperty("date_created")]
+        public DateTime DateCreated { get; set; }
+
+        [JsonProperty("time_created")]
+        public long TimeCreated { get; set; }
+
+        public DateTime getDateTimeCreated()
+        {
+            TimeSpan time = TimeSpan.FromSeconds(TimeCreated);
+            return DateCreated.Date + time; // Combine date and time
+        }
+
+        public DateTime getDateTimeChanged()
+        {
+            TimeSpan time = TimeSpan.FromSeconds(TimeChanged);
+            return DateChanged.Date + time; // Combine date and time
+        }
+
+        [JsonProperty("is_active")]
+        public bool IsActive { get; set; }
+
+        [JsonProperty("terms_of_payment_pk")]
+        public long TermsOfPaymentPk { get; set; }
+
+        [JsonProperty("is_sysstd_terms_of_payment")]
+        public bool IsSysstdTermsOfPayment { get; set; }
+
+        [JsonProperty("is_blocked_order")]
+        public bool IsBlockedOrder { get; set; }
+
+        [JsonProperty("is_separate_invoice_address")]
+        public bool IsSeparateInvoiceAddress { get; set; }
+
+        [JsonProperty("has_image")]
+        public bool HasImage { get; set; }
+
+        [JsonProperty("address")]
+        public Address Address { get; set; }
+
+        [JsonProperty("address_list")]
+        public List<Address> AddressList { get; set; }
+
+        [JsonProperty("address_delivery")]
+        public object AddressDelivery { get; set; }
+
+        [JsonProperty("communication")]
+        public List<Communication> Communication { get; set; }
+
+        [JsonProperty("_communication_length")]
+        public long CommunicationLength { get; set; }
+
+        [JsonProperty("contact_person")]
+        public List<ContactPerson> ContactPerson { get; set; }
+
+        [JsonProperty("_contact_person_length")]
+        public long ContactPersonLength { get; set; }
+
+     
+
+        [JsonProperty("_contact_chrono_length")]
+        public long ContactChronoLength { get; set; }
+
+      
+
+        [JsonProperty("_order_length")]
+        public long OrderLength { get; set; }
+
+    
+
+        [JsonProperty("searchindex")]
+        public List<object> Searchindex { get; set; }
+
+        [JsonProperty("_searchindex_length")]
+        public long SearchindexLength { get; set; }
+
+     
+
+        [JsonProperty("contact_data")]
+        public ContactData ContactData { get; set; }
+
+        [JsonProperty("_address_list_length")]
+        public long AddressListLength { get; set; }
+
+        [JsonProperty("_contact_data_length")]
+        public long ContactDataLength { get; set; }
+    }
+
+    public partial class Address
+    {
+        [JsonProperty("primary_key")]
+        public long PrimaryKey { get; set; }
+
+        [JsonProperty("postal_code")]
+        public string PostalCode { get; set; }
+
+        [JsonProperty("street")]
+        public string Street { get; set; }
+
+        [JsonProperty("city")]
+        public string City { get; set; }
+
+        [JsonProperty("country")]
+        public string Country { get; set; }
+
+        [JsonProperty("country_iso3")]
+        public string CountryIso3 { get; set; }
+
+        [JsonProperty("federal_state")]
+        public string FederalState { get; set; }
+    }
+
+    public partial class Communication
+    {
+        [JsonProperty("primary_key")]
+        public long PrimaryKey { get; set; }
+
+        [JsonProperty("contact_pk")]
+        public long ContactPk { get; set; }
+
+        [JsonProperty("contact_person_pk")]
+        public long ContactPersonPk { get; set; }
+
+        [JsonProperty("uplink")]
+        public string Uplink { get; set; }
+
+        [JsonProperty("type")]
+        public long Type { get; set; }
+
+        [JsonProperty("description")]
+        public string Description { get; set; }
+
+        [JsonProperty("phone_match_number")]
+        public string PhoneMatchNumber { get; set; }
+
+        [JsonProperty("position")]
+        public long Position { get; set; }
+
+        [JsonProperty("is_newsletter")]
+        public bool IsNewsletter { get; set; }
+
+        [JsonProperty("is_invoice")]
+        public bool IsInvoice { get; set; }
+    }
+    public partial class ContactPerson
+    {
+        [JsonProperty("primary_key")]
+        public long PrimaryKey { get; set; }
+
+        [JsonProperty("contact_pk")]
+        public long ContactPk { get; set; }
+
+        [JsonProperty("name")]
+        public string Name { get; set; }
+
+        [JsonProperty("first_name")]
+        public string FirstName { get; set; }
+
+        [JsonProperty("last_name")]
+        public string LastName { get; set; }
+
+        [JsonProperty("nickname")]
+        public string Nickname { get; set; }
+
+        [JsonProperty("position")]
+        public string Position { get; set; }
+
+        [JsonProperty("has_image")]
+        public bool HasImage { get; set; }
+
+        [JsonProperty("_ref_contact")]
+        public string RefContact { get; set; }
+
+        [JsonProperty("_ref_contact_person")]
+        public string RefContactPerson { get; set; }
+
+        [JsonProperty("date_changed")]
+        public DateTimeOffset DateChanged { get; set; }
+
+        [JsonProperty("time_changed")]
+        public long TimeChanged { get; set; }
+
+        [JsonProperty("user_changed")]
+        public string UserChanged { get; set; }
+
+        [JsonProperty("date_created")]
+        public DateTimeOffset DateCreated { get; set; }
+
+        [JsonProperty("time_created")]
+        public long TimeCreated { get; set; }
+
+        [JsonProperty("user_created")]
+        public string UserCreated { get; set; }
+    }
+
+
+}

Epi2O365/Model/ContactList.cs

@@ -0,0 +1,197 @@
+using System;
+using System.Collections.Generic;
+
+using System.Globalization;
+using Microsoft.Graph.Models;
+using System.IO;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+
+namespace Epi2Exchange2.Model
+{
+    public partial class ContactList
+    {
+        [JsonProperty("success")]
+        public bool Success { get; set; }
+
+        [JsonProperty("namespace")]
+        public string Namespace { get; set; }
+
+        [JsonProperty("action")]
+        public string Action { get; set; }
+
+        [JsonProperty("templateSignature")]
+        public string TemplateSignature { get; set; }
+
+        [JsonProperty("payload_length")]
+        public long PayloadLength { get; set; }
+
+        [JsonProperty("is_send_payload")]
+        public bool IsSendPayload { get; set; }
+
+        [JsonProperty("payload")]
+        public List<Payload> Payload { get; set; }
+
+        //[JsonProperty("filter_options")]
+        //public FilterOptions FilterOptions { get; set; }
+
+        //[JsonProperty("request_duration")]
+        //public long RequestDuration { get; set; }
+
+        //[JsonProperty("req_datetime")]
+        //public ReqDatetime ReqDatetime { get; set; }
+
+        //[JsonProperty("_dbg_request_data")]
+        //public DbgRequestData DbgRequestData { get; set; }
+
+        //[JsonProperty("_dbg_user_info")]
+        //public UserInfo DbgUserInfo { get; set; }
+    }
+
+    public partial class Payload
+    {
+        [JsonProperty("primary_key")]
+        public long PrimaryKey { get; set; }
+
+        [JsonProperty("customer_no")]
+        public long CustomerNo { get; set; }
+
+        [JsonProperty("supplier_no")]
+        public long SupplierNo { get; set; }
+
+        [JsonProperty("name")]
+        public string Name { get; set; }
+
+        [JsonProperty("name1")]
+        public string Name1 { get; set; }
+
+        [JsonProperty("name2")]
+        public string Name2 { get; set; }
+
+        [JsonProperty("name3")]
+        public string Name3 { get; set; }
+
+        [JsonProperty("matchcode")]
+        public string Matchcode { get; set; }
+
+        [JsonProperty("salutation")]
+        public string Salutation { get; set; }
+
+        [JsonProperty("grade")]
+        public string Grade { get; set; }
+
+        [JsonProperty("is_interested")]
+        public bool IsInterested { get; set; }
+
+        [JsonProperty("is_customer")]
+        public bool IsCustomer { get; set; }
+
+        [JsonProperty("is_supplier")]
+        public bool IsSupplier { get; set; }
+
+        [JsonProperty("is_location")]
+        public bool IsLocation { get; set; }
+
+        [JsonProperty("is_vip")]
+        public bool IsVip { get; set; }
+
+        [JsonProperty("is_colleague")]
+        public bool IsColleague { get; set; }
+
+        [JsonProperty("date_changed")]
+        public DateTime DateChanged { get; set; }
+
+        [JsonProperty("time_changed")]
+        public long TimeChanged { get; set; }
+
+        [JsonProperty("date_created")]
+        public DateTime DateCreated { get; set; }
+
+        [JsonProperty("time_created")]
+        public long TimeCreated { get; set; }
+
+        public DateTime getDateTimeCreated()
+        {
+            TimeSpan time = TimeSpan.FromSeconds(TimeCreated);
+            return DateCreated.Date + time; // Combine date and time
+        }
+
+        public DateTime getDateTimeChanged()
+        {
+            TimeSpan time = TimeSpan.FromSeconds(TimeChanged);
+            return DateChanged.Date + time; // Combine date and time
+        }
+
+        [JsonProperty("is_active")]
+        public bool IsActive { get; set; }
+
+        [JsonProperty("terms_of_payment_pk")]
+        public long TermsOfPaymentPk { get; set; }
+
+        [JsonProperty("is_sysstd_terms_of_payment")]
+        public bool IsSysstdTermsOfPayment { get; set; }
+
+        [JsonProperty("has_image")]
+        public bool HasImage { get; set; }
+
+        [JsonProperty("_ref_contact")]
+        public string RefContact { get; set; }
+
+        [JsonProperty("contact_data")]
+        public ContactData ContactData { get; set; }
+
+        [JsonProperty("_contact_data_length", NullValueHandling = NullValueHandling.Ignore)]
+        public long? ContactDataLength { get; set; }
+    }
+
+    public partial class ContactData
+    {
+        [JsonProperty("primary_key")]
+        public long PrimaryKey { get; set; }
+
+        [JsonProperty("contact_pk")]
+        public long ContactPk { get; set; }
+
+        [JsonProperty("supplier_no")]
+        public long SupplierNo { get; set; }
+
+        [JsonProperty("customer_no")]
+        public long CustomerNo { get; set; }
+
+        [JsonProperty("debitor_no")]
+        public string DebitorNo { get; set; }
+
+        [JsonProperty("creditor_no")]
+        public string CreditorNo { get; set; }
+
+        [JsonProperty("rentshop_contact_uri")]
+        public string RentshopContactUri { get; set; }
+
+        [JsonProperty("is_rentshop_active")]
+        public bool IsRentshopActive { get; set; }
+
+        [JsonProperty("discount_rent_customer")]
+        public long DiscountRentCustomer { get; set; }
+
+        [JsonProperty("discount_sale_customer")]
+        public long DiscountSaleCustomer { get; set; }
+
+        [JsonProperty("is_vat_active_customer")]
+        public bool IsVatActiveCustomer { get; set; }
+
+        [JsonProperty("country_type_customer")]
+        public long CountryTypeCustomer { get; set; }
+
+        [JsonProperty("discount_rent_supplier")]
+        public long DiscountRentSupplier { get; set; }
+
+        [JsonProperty("discount_sale_supplier")]
+        public double DiscountSaleSupplier { get; set; }
+
+        [JsonProperty("is_vat_active_supplier")]
+        public bool IsVatActiveSupplier { get; set; }
+
+        [JsonProperty("country_type_supplier")]
+        public long CountryTypeSupplier { get; set; }
+    }
+}

Epi2O365/Model/ContactPersonDetail.cs

@@ -0,0 +1,154 @@
+using Microsoft.Graph.Models;
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Epi2Exchange2.Model
+{
+    public partial class ContactPersonDetail
+    {
+        [JsonProperty("success")]
+        public bool Success { get; set; }
+
+        [JsonProperty("namespace")]
+        public string Namespace { get; set; }
+
+        [JsonProperty("action")]
+        public string Action { get; set; }
+
+        [JsonProperty("templateSignature")]
+        public string TemplateSignature { get; set; }
+
+        [JsonProperty("payload_length")]
+        public long PayloadLength { get; set; }
+
+        [JsonProperty("is_send_payload")]
+        public bool IsSendPayload { get; set; }
+
+        [JsonProperty("payload")]
+        public List<ContactPersonPayload> Payload { get; set; }
+
+
+    }
+
+
+    public partial class ContactPersonPayload
+    {
+        [JsonProperty("primary_key")]
+        public long PrimaryKey { get; set; }
+
+        [JsonProperty("contact_pk")]
+        public long ContactPk { get; set; }
+
+        [JsonProperty("name")]
+        public string Name { get; set; }
+
+        [JsonProperty("first_name")]
+        public string FirstName { get; set; }
+
+        [JsonProperty("last_name")]
+        public string LastName { get; set; }
+
+        [JsonProperty("nickname")]
+        public string Nickname { get; set; }
+
+        [JsonProperty("position")]
+        public string Position { get; set; }
+
+        [JsonProperty("date_of_birth")]
+        public string DateOfBirth { get; set; }
+
+        [JsonProperty("department")]
+        public string Department { get; set; }
+
+        [JsonProperty("salutation")]
+        public string Salutation { get; set; }
+
+        [JsonProperty("grade")]
+        public string Grade { get; set; }
+
+        [JsonProperty("has_image")]
+        public bool HasImage { get; set; }
+
+        [JsonProperty("communication")]
+        public List<ContactPersonCommunication> Communication { get; set; }
+
+   
+
+        [JsonProperty("searchindex")]
+        public List<object> Searchindex { get; set; }
+
+        [JsonProperty("date_changed")]
+        public DateTimeOffset DateChanged { get; set; }
+
+        [JsonProperty("time_changed")]
+        public long TimeChanged { get; set; }
+
+        [JsonProperty("user_changed")]
+        public string UserChanged { get; set; }
+
+        [JsonProperty("date_created")]
+        public DateTimeOffset DateCreated { get; set; }
+
+        [JsonProperty("time_created")]
+        public long TimeCreated { get; set; }
+
+        [JsonProperty("user_created")]
+        public string UserCreated { get; set; }
+
+        public DateTime getDateTimeCreated()
+        {
+            TimeSpan time = TimeSpan.FromSeconds(TimeCreated);
+            return DateCreated.Date + time; // Combine date and time
+        }
+
+        public DateTime getDateTimeChanged()
+        {
+            TimeSpan time = TimeSpan.FromSeconds(TimeChanged);
+            return DateChanged.Date + time; // Combine date and time
+        }
+
+
+        [JsonProperty("_communication_length")]
+        public long CommunicationLength { get; set; }
+
+        [JsonProperty("_contact_chrono_length")]
+        public long ContactChronoLength { get; set; }
+    }
+
+    public partial class ContactPersonCommunication
+    {
+        [JsonProperty("primary_key")]
+        public long PrimaryKey { get; set; }
+
+        [JsonProperty("contact_pk")]
+        public long ContactPk { get; set; }
+
+        [JsonProperty("contact_person_pk")]
+        public long ContactPersonPk { get; set; }
+
+        [JsonProperty("uplink")]
+        public string Uplink { get; set; }
+
+        [JsonProperty("type")]
+        public long Type { get; set; }
+
+        [JsonProperty("description")]
+        public string Description { get; set; }
+
+        [JsonProperty("phone_match_number")]
+        public string PhoneMatchNumber { get; set; }
+
+        [JsonProperty("position")]
+        public long Position { get; set; }
+
+        [JsonProperty("is_newsletter")]
+        public bool IsNewsletter { get; set; }
+
+        [JsonProperty("is_invoice")]
+        public bool IsInvoice { get; set; }
+    }
+}

Epi2O365/O365Connector.cs

@@ -0,0 +1,165 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.Graph;
+using Microsoft.Identity.Client;
+using Microsoft.Graph.Models;
+using Microsoft.Kiota.Abstractions.Authentication;
+using System.ComponentModel.Design;
+using log4net;
+using System.Threading;
+
+namespace Epi2Exchange2
+{
+    internal class O365Connector
+    {
+        private static readonly ILog Logger = LogManager.GetLogger(typeof(O365Connector));
+        private string clientID;
+        private string clientSecret;
+        private string tenantID;
+        private string BaseUrl;
+
+        public O365Connector(string clientID, string clientSecret, string tenantID, string BaseUrl)
+        {
+            this.clientID = clientID;
+            this.clientSecret = clientSecret;
+            this.tenantID = tenantID;
+            this.BaseUrl = BaseUrl;
+        }
+
+        public async Task SyncContact(Contact contact, string destinationAccountPrimaryAddress)
+        {
+            try
+            {
+                var graphClient = await GetGraphClient();
+                if (await DoesContactExist(contact, destinationAccountPrimaryAddress, graphClient))
+                {
+                    Logger.Info("Contact " + contact.DisplayName + " found in O365");
+                    string O365ContactID = await GetContactIdByNickName(graphClient, destinationAccountPrimaryAddress, contact.NickName);
+
+                    if (!string.IsNullOrEmpty(O365ContactID))
+                    {
+                        await graphClient.Users[destinationAccountPrimaryAddress]
+                            .Contacts[O365ContactID]
+                            .PatchAsync(contact);
+                        Logger.Info($"Contact with ID '{O365ContactID}' successfully updated.");
+                    }
+                    else
+                    {
+                        Logger.Warn("No valid contact ID found for update.");
+                    }
+                }
+                else
+                {
+                    Logger.Info("Contact " + contact.DisplayName + " NOT found in O365");
+                    Logger.Info("Creating new Contact");
+                    await graphClient.Users[destinationAccountPrimaryAddress].Contacts.PostAsync(contact);
+                }
+            }
+            catch (Exception ex)
+            {
+                Logger.Error("Error while synchronizing contact: " + ex.Message);
+            }
+        }
+
+        private async Task<string> GetContactIdByNickName(GraphServiceClient graphClient, string userPrimaryMail, string nickName)
+        {
+            try
+            {
+                var contacts = await graphClient.Users[userPrimaryMail]
+                    .Contacts
+                    .GetAsync(requestConfiguration =>
+                    {
+                        requestConfiguration.QueryParameters.Filter = $"NickName eq '{nickName}'";
+                    });
+
+                var contact = contacts?.Value?.FirstOrDefault();
+                return contact?.Id;
+            }
+            catch (Exception ex)
+            {
+                Logger.Error($"Error retrieving contact with NickName '{nickName}': {ex.Message}");
+                return null;
+            }
+        }
+
+        private async Task<GraphServiceClient> GetGraphClient()
+        {
+            try
+            {
+                var clientApp = ConfidentialClientApplicationBuilder.Create(clientID)
+                    .WithClientSecret(clientSecret)
+                    .WithAuthority(new Uri($"{BaseUrl}/{tenantID}"))
+                    .Build();
+
+                var accessTokenProvider = new TokenAcquisitionProvider(clientApp);
+                var authProvider = new BaseBearerTokenAuthenticationProvider(accessTokenProvider);
+
+                return new GraphServiceClient(authProvider);
+            }
+            catch (Exception ex)
+            {
+                Logger.Error("Error initializing GraphServiceClient: " + ex.Message);
+                throw;
+            }
+        }
+
+        private async Task<bool> DoesContactExist(Contact contact, string userPrimaryMail, GraphServiceClient graphClient)
+        {
+            string NickName = contact.NickName;
+            if (string.IsNullOrWhiteSpace(NickName))
+            {
+                Logger.Warn("No valid NickName found for the given contact.");
+                return false;
+            }
+
+            try
+            {
+                var contacts = await graphClient.Users[userPrimaryMail]
+                    .Contacts
+                    .GetAsync(requestConfiguration =>
+                    {
+                        requestConfiguration.QueryParameters.Filter = $"NickName eq '{NickName}'";
+                    });
+
+                bool exists = contacts?.Value != null && contacts.Value.Any();
+                Logger.Info($"Contact with NickName '{NickName}' exists: {exists}");
+                return exists;
+            }
+            catch (Exception ex)
+            {
+                Logger.Error($"Error checking contacts: {ex.Message}");
+                return false;
+            }
+        }
+    }
+
+    public class TokenAcquisitionProvider : IAccessTokenProvider
+    {
+        private readonly IConfidentialClientApplication _clientApp;
+
+        public TokenAcquisitionProvider(IConfidentialClientApplication clientApp)
+        {
+            _clientApp = clientApp;
+        }
+
+        public async Task<string> GetAuthorizationTokenAsync(Uri uri, Dictionary<string, object> additionalAuthenticationContext = default, CancellationToken cancellationToken = default)
+        {
+            try
+            {
+                var result = await _clientApp.AcquireTokenForClient(new[] { "https://graph.microsoft.com/.default" })
+                                             .ExecuteAsync(cancellationToken);
+                return result.AccessToken;
+            }
+            catch (Exception ex)
+            {
+                Logger.Error("Error acquiring token: " + ex.Message);
+                throw;
+            }
+        }
+
+        public AllowedHostsValidator AllowedHostsValidator { get; } = new AllowedHostsValidator();
+    }
+}

Epi2O365/Program.cs

@@ -0,0 +1,206 @@
+using System;
+using System.Threading.Tasks;
+using System.Net.Http.Headers;
+using System.Runtime.CompilerServices;
+using System.Configuration;
+using Microsoft.Graph.Models;
+using log4net;
+using System.Net.Mail;
+using System.IO;
+using System.Linq;
+
+namespace Epi2Exchange2
+{
+    class Program
+    {
+        private static readonly ILog Logger = LogManager.GetLogger(typeof(Program));
+        private static ConfigLoader Configuration;
+        private static Model.ContactList ContactList;
+        private static O365Connector O365;
+
+        static async Task Main()
+        {
+            string pathLastRuntime = "LastRun.txt";
+            DateTime LastRun = DateTime.Parse("01.01.1970 10:00:00");
+
+            try
+            {
+                if (File.Exists(pathLastRuntime))
+                {
+                    Logger.Debug("Last run file found. Attempting to parse datetime.");
+                    string datetimeFromText = File.ReadAllText(pathLastRuntime);
+                    Logger.Debug("Found datetime string: " + datetimeFromText);
+
+                    LastRun = DateTime.Parse(datetimeFromText);
+                    Logger.Info("Last run timestamp: " + LastRun.ToString());
+                }
+            }
+            catch (Exception ex)
+            {
+                Logger.Error("Failed to parse last run timestamp from " + pathLastRuntime + ". Error: " + ex.Message);
+            }
+
+            Logger.Info("Updating last run timestamp.");
+            updateLastRunTimestamp();
+
+            try
+            {
+                Logger.Info("Initializing configuration.");
+                Configuration = ConfigLoader.Instance;
+                Logger.Info("Configuration loaded successfully.");
+            }
+            catch (Exception ex)
+            {
+                Logger.Error("Error loading configuration: " + ex.Message);
+                return;
+            }
+
+            try
+            {
+                Logger.Info("Initializing O365 connector.");
+                O365 = new O365Connector(Configuration.AzureAd.ClientId, Configuration.AzureAd.ClientSecret, Configuration.AzureAd.TenantId, Configuration.Graph.BaseUrl);
+                Logger.Info("O365 connector initialized.");
+            }
+            catch (Exception ex)
+            {
+                Logger.Error("Error initializing O365 connector: " + ex.Message);
+                return;
+            }
+
+            try
+            {
+                Logger.Info("Fetching Epirent contacts.");
+                ContactList = new EpiContacts().getContactList(LastRun);
+            }
+            catch (Exception ex)
+            {
+                Logger.Error("Error fetching contacts: " + ex.Message);
+                return;
+            }
+
+            foreach (Model.Payload Contact in ContactList.Payload)
+            {
+                try
+                {
+                    Logger.Debug("Processing contact: " + Contact.Name + " (Primary Key: " + Contact.PrimaryKey + ")");
+                    Model.ContactDetail contactDetail = new EpiContacts().GetContactDetail(Contact.PrimaryKey);
+
+                    var CompanyPhoneNumbers = contactDetail.Payload[0].Communication
+                        .Where(c => c.Type == 0)
+                        .Select(c => c.PhoneMatchNumber)
+                        .ToList();
+
+                    var CompanyMailAddresses = contactDetail.Payload[0].Communication
+                        .Where(c => c.Type == 3)
+                        .Select(c => new Microsoft.Graph.Models.EmailAddress
+                        {
+                            Address = c.Uplink,
+                            Name = Contact.Name
+                        })
+                        .ToList();
+
+                    var CompanyMobilePhoneNumber = contactDetail.Payload[0].Communication
+                        .FirstOrDefault(c => c.Type == 2)?.PhoneMatchNumber;
+
+                    Contact o365CompanyContact = new Contact
+                    {
+                        DisplayName = contactDetail.Payload[0].Name,
+                        CompanyName = contactDetail.Payload[0].Name,
+                        EmailAddresses = CompanyMailAddresses,
+                        BusinessPhones = CompanyPhoneNumbers,
+                        MobilePhone = CompanyMobilePhoneNumber,
+                        NickName = Contact.PrimaryKey.ToString(),
+                    };
+
+                    foreach (string addressBookHolder in Configuration.Graph.Users)
+                    {
+                        try
+                        {
+                            O365.SyncContact(o365CompanyContact, addressBookHolder);
+                            Logger.Info("Contact synchronized for user: " + addressBookHolder);
+                        }
+                        catch (Exception ex)
+                        {
+                            Logger.Error("Error synchronizing contact for " + addressBookHolder + ": " + ex.Message);
+                        }
+                    }
+
+                    foreach (Model.ContactPerson contactPerson in contactDetail.Payload[0].ContactPerson)
+                    {
+                        try
+                        {
+                            Logger.Debug("Processing contact person: " + contactPerson.Name);
+                            Model.ContactPersonPayload cperson = new EpiContacts().GetContactPersonDetail(contactPerson.PrimaryKey).Payload[0];
+
+                            var phoneNumbers = cperson.Communication
+                                .Where(c => c.Type == 0)
+                                .Select(c => c.PhoneMatchNumber)
+                                .ToList();
+
+                            var mailAddresses = cperson.Communication
+                                .Where(c => c.Type == 3)
+                                .Select(c => new Microsoft.Graph.Models.EmailAddress
+                                {
+                                    Address = c.Uplink,
+                                    Name = cperson.Name
+                                })
+                                .ToList();
+
+                            var MobilePhoneNumber = cperson.Communication
+                                .FirstOrDefault(c => c.Type == 2)?.PhoneMatchNumber;
+
+                            Contact o365contact = new Contact
+                            {
+                                GivenName = cperson.FirstName,
+                                Surname = cperson.LastName,
+                                DisplayName = cperson.Name,
+                                CompanyName = contactDetail.Payload[0].Name,
+                                Department = cperson.Department,
+                                JobTitle = cperson.Position,
+                                EmailAddresses = mailAddresses,
+                                BusinessPhones = phoneNumbers,
+                                MobilePhone = MobilePhoneNumber,
+                                NickName = Contact.PrimaryKey + "-" + cperson.PrimaryKey
+                            };
+
+                            foreach (string addressBookHolder in Configuration.Graph.Users)
+                            {
+                                try
+                                {
+                                    O365.SyncContact(o365contact, addressBookHolder);
+                                    Logger.Info("Contact person synchronized for user: " + addressBookHolder);
+                                }
+                                catch (Exception ex)
+                                {
+                                    Logger.Error("Error synchronizing contact person for " + addressBookHolder + ": " + ex.Message);
+                                }
+                            }
+                        }
+                        catch (Exception ex)
+                        {
+                            Logger.Error("Error processing contact person " + contactPerson.Name + ": " + ex.Message);
+                        }
+                    }
+                }
+                catch (Exception ex)
+                {
+                    Logger.Error("Error processing contact " + Contact.Name + ": " + ex.Message);
+                }
+            }
+        }
+
+        private static void updateLastRunTimestamp()
+        {
+            string fileName = "LastRun.txt";
+            try
+            {
+                File.WriteAllText(fileName, DateTime.Now.ToString());
+                Logger.Info("Last run timestamp updated successfully.");
+            }
+            catch (Exception ex)
+            {
+                Logger.Error("Error updating last run timestamp: " + ex.Message);
+            }
+        }
+    }
+}

Epi2O365/appsettings.examples.json

@@ -0,0 +1,19 @@
+{
+  "AzureAd": {
+    "ClientId": "xxx",
+    "TenantId": "xxx",
+    "ClientSecret": "xxx"
+  },
+  "Graph": {
+    "BaseUrl": "https://login.microsoftonline.com",
+    "Users": [
+      "xx@yy.de"
+    ]
+  },
+  "Epirent": {
+    "Server": "xx",
+    "Port": 8080,
+    "Token": "xx",
+    "Mandant": 2
+  }
+}

Epi2O365/log4net.config

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<log4net>
+	<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
+		<file value="logs/app.log" />
+		<appendToFile value="true" />
+		<rollingStyle value="Date" />
+		<datePattern value="yyyy-MM-dd'.log'" />
+		<layout type="log4net.Layout.PatternLayout">
+			<conversionPattern value="[%date] [%level] %logger - %message%newline" />
+		</layout>
+	</appender>
+
+	<appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender">
+		<layout type="log4net.Layout.PatternLayout">
+			<conversionPattern value="[%date] [%level] %logger - %message%newline" />
+		</layout>
+	</appender>
+
+	<root>
+		<level value="ALL" />
+		<appender-ref ref="RollingFileAppender" />
+		<appender-ref ref="ConsoleAppender" />
+	</root>
+</log4net>

README.md

@@ -1,2 +1,8 @@
+<<<<<<< HEAD
+# Epi2O365
+
+Epirent zu Office 365 Kontakt-Synch
+=======
 # Epi2Exchange2
 
+>>>>>>> 25eb04a98c1e26e079c696e683ab5a927f63ebfc