With Exchange 2013 shell when executing "Test-OutlookWebServices" I have to supply the -MailboxCredential parameter in order for the "Autodiscover: Outlook Provider" to return success. E.g.
Test-OutlookWebServices -clientaccessserver ex2013 -identity asenna@test.lab -MailboxCredential (get-credential test\asenna)
If I change the MailboxCredential to an that of an Exchange Administrator then the "Autodiscover: Outlook Provider" will return Failure.
Running the command on an Exchange 2010 server for a 2010 mailbox does not require the MailboxCredential parameter and always succeeds.
Why the change for 2013?
Alan