Teams Calendar tab missing

New Contributor

Hi all,


We have a hybride environment with exchange 2016 with the wright CU.

I did the steps for the oauth.


When i do the test from microsoft.

And choose the Teams Calendar Tab test. I get the error:


The user mailbox is marked as undiscoverable by the Teams middle-tier service.


But still im missing the calendar button in Teams.


Any help would hihly be appriciated. 

1 Reply
I’d definitely check the network reqs so ip’s and ports required are indeed opened.