Graph API Email, Presence, MailboxSettings, Calendar client

Blogs

Send Emails using Microsoft Graph API and a desktop client

History

2021-12-14 Added more graph clients

2021-12-13 Updated to .NET 6, added calendar events, UserMailbox settings client

Requirements

To send emails using Microsoft Graph API, you need to have an office license for the Azure Active Directory user which sends the email.

You can sign-in here to check this:

https://www.office.com

Setup Azure App registration

The API permissions require the Graph delegated permissions.

Email client

The Azure App registration requires the Graph API delegated Mail.Send and the Mail.ReadWrite scopes.

  <appSettings>
    <add key="AADInstance" value="https://login.microsoftonline.com/{0}/v2.0"/>
    <add key="Tenant" value="--your-tenant--"/>
    <add key="ClientId" value="--your-client-id--"/>
    <add key="Scope" value="User.read Mail.Send Mail.ReadWrite"/>
  </appSettings>

Presence client

The Azure App registration requires the Graph API delegated User.Read.All and Presence.Read.All scope.

  <appSettings>
    <add key="AADInstance" value="https://login.microsoftonline.com/{0}/v2.0"/>
    <add key="Tenant" value="--your-tenant--"/>
    <add key="ClientId" value="--your-client-id--"/>
    <add key="Scope" value="User.read User.Read.All Presence.Read.All"/>
  </appSettings>

User Mailbox settings client

The Azure App registration requires the Graph API delegated User.Read.All MailboxSettings.Read scopes.

  <appSettings>
    <add key="AADInstance" value="https://login.microsoftonline.com/{0}/v2.0"/>
    <add key="Tenant" value="--your-tenant--"/>
    <add key="ClientId" value="--your-client-id--"/>
    <add key="Scope" value="User.read User.Read.All MailboxSettings.Read"/>
  </appSettings>

Calendar client

The Azure App registration requires the Graph API delegated User.Read.All **Calendars.Read Calendars.Read.Shared scopes.

  <appSettings>
    <add key="AADInstance" value="https://login.microsoftonline.com/{0}/v2.0"/>
    <add key="Tenant" value="--your-tenant--"/>
    <add key="ClientId" value="--your-client-id--"/>
    <add key="Scope" value="User.read User.Read.All Calendars.Read Calendars.Read.Shared"/>
  </appSettings>

Nuget packages

<ItemGroup>
  <PackageReference Include="Microsoft.Identity.Client" Version="4.39.0" />
  <PackageReference Include="Microsoft.Graph" Version="4.11.0" />
  <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
</ItemGroup>

C# to Visual Basic

I converted the project from C# to Visual Basic using the telerik tool:

https://converter.telerik.com/

Links

https://docs.microsoft.com/en-us/graph/outlook-send-mail-from-other-user

https://stackoverflow.com/questions/43795846/graph-api-daemon-app-with-user-consent

https://winsmarts.com/managed-identity-as-a-daemon-accessing-microsoft-graph-8d1bf87582b1

https://cmatskas.com/create-a-net-core-deamon-app-that-calls-msgraph-with-a-certificate/

https://docs.microsoft.com/en-us/graph/api/user-sendmail?view=graph-rest-1.0&tabs=http

https://docs.microsoft.com/en-us/answers/questions/43724/sending-emails-from-daemon-app-using-graph-api-on.html

https://stackoverflow.com/questions/56110910/sending-email-with-microsoft-graph-api-work-account

https://docs.microsoft.com/en-us/graph/sdks/choose-authentication-providers?tabs=CS#InteractiveProvider

https://docs.microsoft.com/en-us/graph/api/cloudcommunications-getpresencesbyuserid?view=graph-rest-1.0&tabs=csharp

https://docs.microsoft.com/en-us/graph/api/user-get-mailboxsettings?view=graph-rest-1.0&tabs=csharp

https://docs.microsoft.com/en-us/graph/api/user-list-events?view=graph-rest-1.0&tabs=csharp

More information

For more information see MSAL.NET's conceptual documentation:

• Quickstart: Register an application with the Microsoft identity platform
• Quickstart: Configure a client application to access web APIs
• Recommended pattern to acquire a token in public client applications
• Acquiring tokens interactively in public client applications
• Customizing Token cache serialization