Forum Discussion
bclee
Jul 23, 2024Copper Contributor
OWA loop after Exchange 2019 enabling Extended Protection
Has anyone encountered before?
Scenario
- Exchange environment is Exchange 2016 & Exchange 2019.
- Exchange 2016 - Extended Protection not enabled
- Exchange 2019 - Extended Protection enabled.
- User mailbox is residing in Exchange 2019
- User attempt to login via OWA (FBA) on Exchange 2016
- When login, the page keeps looping back to the logon screen.
Error in httproxy owa logs: WebExceptionStatus=ProtocolError;ResponseStatusCode=401;WebException=System.Net.WebException: The remote server returned an error: (401) Unauthorized.
Attempted to login to both OWA & ECP via OWA on Exchange 2019 - successful.
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