microsoft exchange active directory topology service wont start after failed KBKB4045655 install

Question

_{Friday, December 22, 2017 3:42 PM}

The microsoft exchange active directory topology service wont start after failed KB4045655 install.  The error I get in the event log when trying to start the service is:

Log Name:      Application

Source:        .NET Runtime
Date:          12/22/2017 9:56:56 AM
Event ID:      1026
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      EX2016-1.umasd.org
Description:
Application: Microsoft.Exchange.Directory.TopologyService.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.IO.FileNotFoundException
   at Microsoft.Exchange.Directory.TopologyService.TopologyServiceMain.Main(System.String[])

I can't find an indication of what file might be missing.  The server was working before.  It's exchange 2016 cu7 in a dag.  After KB4045655 attempted to install through windows update most services were disabled.  I changed them back to automatic but no exchange services will come up without the AD topology service.  The server is 2016 v1607.

All replies (2)

_{Monday, December 25, 2017 2:28 AM ✅Answered | 1 vote}

Hi Andrew,

Thanks for contacting our forum. There are two versions of this KB, we don't the windows update download which version, it’s recommended to uninstall the updated on your server and download the version of CU7 manually then install it again.

Security Update For Exchange Server 2016 CU6 (KB4045655)

Security Update For Exchange Server 2016 CU7 (KB4045655)

Refer to: https://support.microsoft.com/en-us/help/4045655/description-of-the-security-update-for-microsoft-exchange-december-12　　

If it still doesn't work, we need to verify the .NET Framework with this useful tool and then check the results:

http://blogs.msdn.com/b/astebner/archive/2008/10/13/8999004.aspx　 

How to Fix Runtime error 1026?

Please note: Since the website is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information. And the changes made in the above blog is not supported officially by Microsoft.

Hope it helps.

Regards,

Jason Chao

Please remember to mark the replies as answers if they helped.
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_{Tuesday, December 26, 2017 10:49 PM ✅Answered | 1 vote}

Hi Andrew,

I had the same problem, after a failed update of KB4045655, all my exchange services were disabled and won't start manually.

I found the solution here to install manually the update KB4045655, and finally successfully start exchange services

https://social.technet.microsoft.com/Forums/en-US/5e6badad-6f5b-4f98-bd80-aa38eebfe0dd/kb4036108-patch-fails-the-term-stopsetupservice-is-not-recognized?referrer=http://social.technet.microsoft.com/Forums/en-US/5e6badad-6f5b-4f98-bd80-aa38eebfe0dd/kb4036108-patch-fails-the-term-stopsetupservice-is-not-recognized?forum=Exch4016SD

The solution was given by Zarach.

Hope it helps