Calender in Teams not working with Onprem Mailboxes / Hybrid with Exchange 2016
Hi, we have a hybrid echange 2016 with office 365. ADsync is working and we managed to succesfull config the classic hybrid. we can migrate mailboxes to the oline exchange, but most of the boxes are on the onprem exchange. we upgrades to Exchange 2016 CU16. In Teams you can see the Calender in left pane, but it fails to show up -> Couldn´t load your calender. Lets give it another try The HWC could be completed succesfully and the firewall daos not block anythin on port 80 or 443. We tried with and without online exchange licences even for the onprem mailboxes. Only the User with Online Mailboxes can see the calender in teams. Same in Web and Desktop App. Can anyone help what to check?
