Today I ran into an issue, as a customer I am currently installing Lync Server 2010 for was looking to use their already established DFS file share with Lync. This feature has been supported since the dawning of OCS14, but funny enough not something that could be accomplished in the TB.
Since CU5 in February this was something that MSFT fixed, as stated in the KB article. Nevertheless, I could not get it working. Entering a DFS root and the share name (Share name = dfsroot\share) only resulted in an error. This was despite that CU5 had been applied to the Administrative Tools, TB included.
Rune's blog about things I see and UC 