I have a interesting issue and a question.
I have a client that has moved to Exchange Online and uses AD Connect. They noticed that they are not able to manage the Exchange attributes from the Cloud. So the decision was made to install Exchange Server 2016 in Hybrid mode. After installing the server which took some doing, the client sees all of his users but no data. But they do get an error "The object CG/Domain/Group/Users/ has been corrupted or isn't compatible with the Microsoft support requirements, and it's in an inconsistent state. The following errors happened: Database is mandatory."
Any suggestions?
Also, is there a supported way of supporting Exchange Online without a Hybrid install of Exchange Server?