Customer traveling and trying to access his email and getting the error: Error Code: 500 Internal Server Error. The token supplied to the function is invalid.
We recently lost our Exchange engineer and are in the process of looking for a new one. In the meantime, can someone help us figure this issue out?
Thanks in advance!
Please run EXBPA to do a health check for exchange server.
Please try to remove owa virtual directory and recreate it.
Remove an Outlook Web App Virtual Directory
After do it and check the result.
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