- Install the latest cumulative update for the version of Exchange Server that you're running. For more information, see the following resources:
- Run the Hybrid Configuration Wizard again from http://aka.ms/HybridWizard.
- If the issue persists, manually configure OAuth authentication. For more information about how to do this, see Configure OAuth authentication between Exchange and Exchange Online organizations.
Article ID: 3185378 - Last Review: Dec 21, 2016 - Revision: 1