Delegate scheduling does not work

[Simone Anzaldi]

Hi all,

I'm cannot figure out how to enable Teams delegate scheduling for Exchange On-Premises users.

• The environment is Exchange 2016 CU 17 configured in hybrid
• OAuth between Exchange Server and EXO is enabled following this procedure https://docs.microsoft.com/en-us/exchange/configure-oauth-authentication-between-exchange-and-exchan...
• Step 2 and 3 executed https://docs.microsoft.com/en-us/skypeforbusiness/deploy/integrate-with-exchange-server/oauth-with-o...
• Control Access to EWS is not configured (default setting) 

I have two users with Exchange On-Prem mailboxes. Both users are migrated to Teams Only.

When the delegate tries to schedule a Teams meeting to his boss calendar, he gets the following error

What am I missing?

Thanks in advance

[#2]

@Simone Anzaldi Hello, if all these settings are verified and it still doesn't work I suggest you open up a support ticket with Microsoft.

https://docs.microsoft.com/en-us/microsoftteams/exchange-teams-interact#requirements-to-create-and-v...