Kenneth Fisher hits a frequent cause of login failure:
No go. Next thing to check is the password. The error I’m getting does indicate the incorrect password so it’s a distinct possibility. Now when I moved the server principal I made sure to copy the password hash from the old server so the password should be the same. However, I’ve made mistakes before, and odd things happen, so I decided to change the password just in case. Before I did I backed up the original password just in case.
The solution is something that I’ve seen a lot of sysadmins forget to do in their setup processes.