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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 🙂
Hello all,
I installed Exchange 2013 CU23 on our standalone server and got the same issue:
Exception type: ExAssertException Exception message: ASSERT: HMACProvider.GetCertificates:protectionCertificates.Length<1
The Exchange Auth certificate wasn't expired though. Anyway I tried generating a new certificate and publish it. It didn't resolve the issues. Even after 2 hours of waiting.
After all (before trying the last resort option to uninstall CU23) I tried using the old valid certificate and published it using the same procedure as described https://docs.microsoft.com/en-us/exchange/troubleshoot/administration/cannot-access-owa-or-ecp-if-oauth-expired.
After that OWA and ECP returned back to life.
With the best regards,
Marat