Problem accessing OWA after applying the Security Update

[Gaston NDOUMBE]

Hello Experts

I have a problem with the last security update . i have a farm of 8 DAG servers and i started updating server number I got an error 500 but was able to troobleshoot because i had an event in the application log about a directory missing.but what is surprising while updating server 2 ., The OWA breaks again and affected even the OWA of server 1 is there something i am missing?

I tried to run the Updatecas as mention in the FAQ but No success

[#2]

Hi @Gaston NDOUMBE ,

Do the following:
1.Start IIS Manager on the server.
2.Navigate to Exchange Backend website > ECP Virtual directory.
3.Select Application settings > BinsearchFolder.
4.Check the paths to the Exchange directories that are listed. You might see directory paths that resemble the following:
•%ExchangeInstallDir%bin;%ExchangeInstallDir%bin\CmdletExtensionAgents;%ExchangeInstallDir%ClientAccess\Owa\bin
1.Replace the paths with the following paths:
•C:\Program Files\Microsoft\Exchange Server\V15\bin;
•C:\Program Files\Microsoft\Exchange Server\V15\bin\CmdletExtensionAgents;
•C:\Program Files\Microsoft\Exchange Server\V15\ClientAccess\Owa\bin

Option 2: 
.\UpdateCas.ps1
.\UpdateConfigFiles.ps1

https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fexcha... 

Thank you,

Regards,
MD

please do like and share this post, if my answer resolved your issue..

[#3]

Yes Thx I saw this article I tried the scripts and verify the path as well .Still same issue
And i dont see the errors in Application log this is very strange
I had this on a previous server but there was an entry in the Application Log and i was able to solve .

[#4]

Hi @Gaston NDOUMBE ,

Have you tried this?

https://supertekboy.com/2016/08/15/internal-500-server-error-after-fresh-exchange-2016-install/ 

Regards,

MD

[#5]

Hello Saw that one too not the same sitaution . He has an entry in the application log , i dont
Ans i checked that the file he is talking is existing

[#6]

Hi,

Please open a support ticket with Microsoft.

Thank you,