OWA for on-prem server stopped working after updating certificate in on-prem exchange server

[abhishek02687]

I asked question regarding issue with OWA please help:

https://answers.microsoft.com/en-us/outlook_com/forum/outlk_com-outtop_email/owa-stopped-working-aft... 

Hello,

I have recently updated the SSL certificate for Exchange server for the URL and after updating i got error for ECP portal:

I checked in event viewer and got this error:

[Owa] An internal server error occurred. The unhandled exception was: System.NullReferenceException: Object reference not set to an instance of an object.
   at Microsoft.Exchange.HttpProxy.FbaModule.ParseCadataCookies(HttpApplication httpApplication)
   at Microsoft.Exchange.HttpProxy.FbaModule.OnBeginRequestInternal(HttpApplication httpApplication)
   at Microsoft.Exchange.HttpProxy.ProxyModule.<>c__DisplayClass16_0.<OnBeginRequest>b__0()
   at Microsoft.Exchange.Common.IL.ILUtil.DoTryFilterCatch(Action tryDelegate, Func`2 filterDelegate, Action`1 catchDelegate)

Followed the steps as suggested:

https://docs.microsoft.com/en-us/exchange/troubleshoot/administration/cannot-access-owa-or-ecp-if-oa...

but I can see the certificate is not expired:

Still I tried to follow the process further and generated a new certificate and when in tried set-authconfig got this error:

Please help 

@The_Exchange_Team

[#2]

Hey @abhishek02687, please check the back end binding if the certificate is set to the server self signed cert.  If not please set it. Also did you import the new certificate to the server trusted root certificate store?

[#3]

Hey there!
Have you verified in IIS that the correct certificate is applied in the bindings?
Also did you restart the server or at least ran an IIS reset after the cert change?

Also verify that all the Exchange services are running using the Test-ServiceHealth command since I've experienced that some services that are required to display ECP and OWA stopped after cert changes.

[#4]

Can you check the SSL certificates of the sites located on IIS

[#5]

Hello,

I have checked multiple times and I have no sulition to this issue still.
The IIS Bindings are correct and the test Service health is also in good health.

[#6]

I have checked, I no more receive the certificate issues.