A 401 error was received from the server, but no authentication methods are supported. ExRCA

By MAS MVE Exchange Server, Windows Server, Active Directory, Virtu alization, Skype for Business, Microsoft Teams Expert. Sometime when we run Outlook connectivity from https://testconnectivity.microsoft.com/ (ExRCA) we get an error like below If you are running Exchange 2013 SP1 or …

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