I have a client that had OCS 2007 R@ and Lync 2010 side by side. All elements of the OCS pool were disabled except for a Trusted Application Server. The pool was then removed.
Now in topology builder, it still shows the server under the BackSite and I cannot remove it. If I try from the Lync PS, I get:
Remove-CsTrustedApplication : Cannot add, remove, or modify applications on a legacy trusted application pool. Use the legacy tools to modify the applications, then run Merge-CsTopology.
How can I remove this now?