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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 believe this issue about evelated rights is documented in the link below. Unfortunately, this was not our issue. We were experiencing the issue Asterofus provided the solution for.
https://docs.microsoft.com/en-us/exchange/troubleshoot/client-connectivity/owa-stops-working-after-update.
https://docs.microsoft.com/en-us/exchange/troubleshoot/client-connectivity/owa-stops-working-after-update.
I got wiser after I saw the article. the installer .msp should just tell that it should be run as elevated and not as a normal user, it would have solved a lot 🙂