Forum Discussion
Nikolas_Athanasakis
Jul 14, 2021Copper Contributor
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...
- Jul 14, 2021Ok 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 🙂
Matt-Freeman
Copper Contributor
We are having the same issue. However my current OAuth cert doesn't expire until 4/22. Any reason to replace it anyway? Also, I applied KB5004779 yesterday.
KarlT700
Jul 15, 2021Copper Contributor
See my reply below
- JanirbyJul 15, 2021Copper ContributorI did all above with out any luck.
then running the kb5004780 (Exchange 2019) i an elevated cmd, then OWA and ECP worked again.
(ran kb5004780 first as a normal user, not elevated cmd)- T3chGuy007Jul 15, 2021Copper ContributorI 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.- JanirbyJul 15, 2021Copper ContributorI 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 🙂