"Your Out of Office settings cannot be displayed, because the server is currently unavailable. Try again later."
This is an error message received from one of our users. He said he cannot turn off his Out of Office assistant. I then tried access my OOF, and same error message.
Did a brief search, and ran this command in Exchange Power Shell: Test-OutlookWebServices
Message: About to test AutoDiscover with the e-mail address MagicianB@Domain.com.
Message: Testing server martini.bcr.local with the published name https://mail.domain.com/EWS/Exchange.asmx & .
Message : Found a valid AutoDiscover service connection point. The AutoDiscover URL on this object is https://mail.domain.com/Autodiscover/Autodiscover.xml.
Message: When contacting https://mail.domain.com/Autodiscover/Autodiscover.xml received the error The remote server returned an error: (401) Unauthorized.
Message: Failed to contact AutoDiscover