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EWS with oAuth "An internal server error occurred. The operation failed."
Hi... Since yesterday, my synchronization application starts throwing exceptions with the following error "An internal server error occurred. The operation failed." It only happen for mai...
Our QA team has noticed this problem happening recently as well (started reporting Aug 29, 2022 but it probably started earlier than that). The issue is still ongoing for us.
This error has stopped happening for us this week. QA has verified that it is no longer occurring over multiple days. We made no change on our side, so it was definitely a change on the Microsoft side which caused it and resolved it.
