BizTalk 2010 Could not load file or assembly 'Microsoft.BizTalk.Interop.SSOClient

Question

Our server uses BizTalk 2010. Suddenly, we are receiving the following error:

Could not load file or assembly 'Microsoft.BizTalk.Interop.SSOClient, Version=10.0.1000.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.

Other users that had this issue were usually trying to upgrade to a newer version of BizTalk. This is not the case here. We used version 2010 before, and are still using 2010.

Two things happened that may have to do with the sudden issues: there was a monthly windows patching round, and there was a deployment of a BizTalk application.

If anyone has any idea of how we can fix the Interop.SSOClient version, it would be greatly appreciated!

Answer 1

You must have a version 10 reference of the SSOClient in your code base somewhere, i'd simply do a quick search in all files for the Microsoft.BizTalk.Interop.SSOClient, Version=10.0.1000.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 string and see where you end up at...