Hello,
we are using an Exchange Hybrid with two Exchange 2016 CU21 in a DAG with KEMP in front of them. The HCW and AADConnect are running without errors. Mailbox onboarding and mail flow is successful.
In Teams the calendar button is visable, but the calendars show empty for on premise users.
We followed all troubleshooting steps listed on the following site: teams-exchange-interaction-issue
All steps are successful including the "Teams" and "FreeBusy" checks out of testconnectivity.microsoft.com.
We also verified the external access via EWSEditor and used a cloud-migrated mailbox to verify free/busy out of EXO-OWA to an on premise mailbox calendar.
Teams Calendar is not able to display mailboxes of OnPremise users. We tried with Teams App and via WebApp.
Has anyone any idea?
Kind regards
Steve