Resolved -
All systems are operational and working.
Mar 24, 13:09 CET
Monitoring -
A fix for customers in hybrid setups has been deployed. We are monitoring the effect of this.
Mar 24, 11:54 CET
Update -
We are still working on a fix
Mar 24, 10:15 CET
Identified -
The error is related to authentication and Exchange Web Services (EWS).
Customers having migrated to Exchange Online without updating mailbox platform are affected. Fix for this scenario is to update this setting.
Customers having a hybrid platform could use the old an on prem Exchange as EWS would also authenticate their users in O365. We are working on a fix to hopefully be able to route authentication the correct direction depending on where the user are being hosted. In this scenario, we still have no fix.
Mar 21, 14:39 CET
Investigating -
We are currently investigating a problem that seems related to on prem Exchange and authentication.
Mar 21, 14:14 CET