How to find an actual physical host/IP for a specific Domain-based DFS file share path?

Since your IT is asking for this info to help you with a trouble you've brought to them, they should really be helping you out. From checking out Technet, it does appear that the DFS tab for a folder from an example machine should tell you what DFS server it's been referred to. I also discovered this nifty cmdline which shows the servers I'm actively connected to for all DFS files. It's got a lot of other options that might help you.

dfsutil /PktInfo

And with 2 more seconds Googling, I see that this is a duplicate question of Determine which DFS referral target a user is using, which I have now given the duplicate answer to.