Forum Discussion
Exchange Server error in '/owa' application
- Ok i found solution. Use this to create new certificate https://docs.microsoft.com/en-us/exchange/troubleshoot/administration/cannot-access-owa-or-ecp-if-oauth-expired
And after creating the certificate you must wait like a hour or more for changes work. Restart dont change the wait time 🙂
Our cert is an externally signed cert that is due to expire next year so we wanted to keep using it and not have to generate a new self sign one.
We worked around this by just running the three PS commands below in Exchange PS
Set-AuthConfig -NewCertificateThumbprint <WE JUST USED OUR CURRENT CERT THUMPRINT HERE> -NewCertificateEffectiveDate (Get-Date)
Set-AuthConfig -PublishCertificate
Set-AuthConfig -ClearPreviousCertificate
Note: that we did have issues running the first command because our cert had been installed NOT allowing the export of the cert key. once we reinstalled the same cert back into the (local Computer) personal cert store but this time using the option to allow export of the cert key, the commands above worked fine.
We then just needed to restart ISS and everything was golden. 😄
