Dynamics 365 (On-Prem) to Exchange Online
I am getting this error when running the Email Server Profile Test after setting up Server Side Email synchronization and configuring an Exchange Online (Hybrid) Email Server Profile. It passes the first two tests (Connecting to Exchange Online, Authorizing by using Microsoft Azure...) but fails on the third test (Checking authentication).
The strange thing is that in the "Response from Exchange" section under the Failure Details I see 'HTTP/1.1 200 OK' which would suggest that everything is hunky dory and no authentication or authorization failures. What follows is a long string of code, which looks like the XML response from EWS perhaps; but no discernible error can be found after combing through it.
Any ideas?
