Why can't users access OWA on external address (name or IP) from within the network? Is there any reason that users can't do this? We can do it fine at my office and my boss says it's down to the router / firewall. Added user in admin, cant access OWA Split from this thread. Can't access OWA (session timed out msg) - 27. I can’t login to webmail from my PC either, though I seem to be able to access other sites (NRRM, BUPERS, etc. Search the community and support articles. This issue occurs if the Exchange Server Auth certificate that's used for OAuth signing is missing from the Exchange Server. It warns about the certificate I created and I install it. Can't access OWA/EAC with expired OAuth certificate Fixes an issue in which you can't sign in to Outlook on the web (formerly known as Outlook Web App) or EAC if the Exchange Server OAuth certificate is expired. My users are still having problems connecting to OWA outside the network. There doesn't exist issue when try to access from Chrome or Firefox. ) externally, were they affected? Is the OWA Virtual Directory configured correctly? Note: Resource mailboxes cannot be accessed directly using Outlook Web App. After entering creds, OWA redirect me to logon page.
(Possible) Cause: TLS version setting on those browsers. Still, if you cannot log in to OWA, run the below given command: get-mailboxdatabase | clean-mailboxdatabase.
