Environment is 2012 R2 domain running four domain controllers: DFL and FFL is 2008
I had four 2008 DCs and all four were name servers in DFS. I spun up four new DCs on 2012 and moved DFS namespaces to two of those four. I was good enough to remove ONE of the old DFS servers from DFS before demoting it and shutting it down, but I FORGOT to remove the other three old DCs from the namespace list before demoting them and shutting them down.
I now have three orphaned namespace servers in my DFS snapin and it's giving me grief. I did right click and disable the three orphaned DFS namespace servers that I forgot to properly remove so just the two new ones are active now.
Some of my PCs are still showing the three old DFS namespace servers. By some, I mean five out of 500 still show the three orphaned namespace servers as well as the two new ones. Some of the PCs even show one of the old orphaned DFS namespace servers as active! The server doesn't even exist, yet it's still showing as active. Now, I suspect that's because I have CNAME alias's pointing the old server names to the new servers. So, technically, if you ping one of the old servers, it will resolve to one of the new servers, but DFS is only on two of the four new servers.
So, anyway, these five PCs that are having problems....when I go to them and look at the DFS properties page for the corporate share, I see the three orphaned namespace servers and one of them is active, even though it doesn't exist any more.
Also, in my DFS snapin on the server, I see the three orphaned DFS servers. It's like the PCs won't release this old info for some reason.
So, this post is a two question post:
How do I get the PCs to release the old orphaned DFS namespace server names
How do I clear those names from my DFS namespace server snapin