Additional info now that I have a minute. Both our Patch Manager server and our WSUS servers were migrated from one datacenter to another. This is not a firewall issue however. I've ruled that out. They did change IP's, but not domains or anything like that.
From a remote console I get the error message this message "login failed for user (domainname)\wsusserver$. For instance to use Microsoft's example, if my Patch Manager server was say Blue in the Contosso domain and my WSUS server was called WSUSP2, it would say that "Login failed for user Contosso\wsusp2$.
There is no such user of course in our domain. Why is it trying to log in as WSUSP2$ Why isn't it using the credentials from the credential ring?
Both our Patch Manager server and our WSUS servers were migrated from one datacenter to another.
The first requirement of successfully diagnosing this scenario is understanding exactly what you mean by "migrated from one datacenter to another" and exactly how that was accomplished.
From a remote console I get the error message this message "login failed for user (domainname)\wsusserver$
As a point of clarification... the dollar sign on the end of a machine name indicates the MACHINE account. If the MACHINE account is unable to authenticate with the domain, then it will also be impossible to authenticate a remote console, since a domain trust is a prerequisite for a remote console connection.
Why this might be happening is relevant to the first question: How was this "migration" performed?