Disclaimer first: I am not a developer or TFS admin, I'm just a sysadmin trying to help out with a TFS-related project.
Our org has an existing instance of TFS 2014 that we want to upgrade to TFS 2017. Before we do that, we want to run a trial upgrade in a test environment in order to shake out any issues.
Our existing TFS 2014 environment has TFS installed on a Windows 2012 VM that's dedicated to TFS. The TFS DBs are on another SQL 2012 server that is shared with other applications.
To create a test instance, I duplicated the TFS VM and placed the copy in our test vSphere environment. I brought it up disconnected from the network, disjoined it from the domain, renamed it, and ran sysprep to generate a new SID. Then I reconnected it to the network and rejoined it to Active Directory using the new computer name.
I've created copies of all the TFS databases and am trying to repoint the test instance of TFS to these DB copies, but I can't seem to do anything. When I try to use TfsConfig or the TFS admin console to do anything I get an error about a database connection and can't seem to do anything. The test TFS VM actually has full connectivity to the SQL Server that's hosting the prod TFS DBs, so I'm not sure why it would complain about DB connectivity.
I've done some Googling, but haven't come up with a solution. Any suggestions?
