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Exchange Server error in '/owa' application
ASSERT: HMACProvider.GetCertificates:protectionCertificates.Length<1 Description: An unhandled exception occurred during the execution of the current web request. Please review the stack tr...
- 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 🙂
I do not currently have a OAuth cert for some reason so I was going to create a new one following this guidelines but I am nervous about impacting mail flow.
Mailflow is not interrupted.
Asterofus Thank you.
Confirmed. I followed the instructions to create the new cert and instantly fixed my problem. No waiting for me.