This demo application synchronizes user appointments with the Microsoft Exchange Web Service (EWS) using Exchange Online (bi-directionally). The application itself exports appointments from the DevExpress WinForms Scheduler control to EWS and imports EWS events to our award-winning WinForms Scheduler control.

Install the following NuGet packages:

• Microsoft.Exchange.WebServices
• Microsoft.Identity.Client

Register your application in Azure (see Register a client application in Microsoft Entra ID if you have yet to register apps on Azure). Once registered, specify tenantId and clientId in App.config:

<appSettings>
  <add key="clientId" value="YOUR_CLIENT_ID"/>
  <add key="tenantId" value="YOUT_TENANT_ID"/>
</appSettings>

The GetExchangeWebService method (Authorization.cs) implements authorization and obtains an ExchangeService object.

NOTE

If EWS is installed on a server within a domain, review the following topic to authorize and obtain the ExchangeService object: Get started with EWS Managed API client applications.

The Synchronizer class (Synchronizer.cs) implements sync APIs:

• GetExchangeAppointments(startSearchDate, endSearchDate) — Returns standard and recurring EWS appointments for the specified time interval.
• ExchangeToScheduler(appointmentStorage, exchangeAppointment) — Imports the specified EWS appointment to the DevExpress WinForms Scheduler.
• SchedulerToExchange(userAppointment) — Exports the specified user appointment from the DevExpress Scheduler to EWS.

Synchronization does not support changed occurrences if associated duration does not fall within the specified time interval.

• Authorization.cs
• Synchronizer.cs
• ExchangeExampleForm.cs

• Synchronize User Appointments with Microsoft 365 Calendars

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