MailboxNotEnabledForRESTAPI REST API is not yet supported for this mailbox when accessing me/photos

Question

In an Azure AD I gave guest access to a user with an outlook.com account. Whenever I try to access graphClient.Me.Photos["48x48"].Content.Request().GetAsync() I get the MailboxNotEnabledForRESTAPI error.

The code is based on the tutorial from https://learn.microsoft.com/en-us/graph/tutorials/aspnet-core?tutorial-step=3

I have removed all references to mailbox and email scopes, yet I still get this error. Why?

Answer 1

You're getting this error as the account is MSA account. If you want to call GetPhoto API call, then this operation in version 1.0 supports only a user's work or school mailboxes and not personal mailboxes. Instead of guest user account, try to see if you can repro the issue with work/school account.