Unable to manage DFS namespace

(updated post)

Hi,

We have an issue with DFS at our site. It has been working fine for years, but recently the ability to manage it using the DFS MMC no longer works. DFS is still working for the users fine and we can map to it manually, but the MMC tool no longer connects. We can create and manage new namespaces fine though.

The error is: " The namespace cannot be queried. The specified domain either does not exist or could not be contacted. "

We can't risk recreating the namespace due to the impact on users, so anyone have any idea to fix this and get DFS MMC working to allow management of the namespace?

Many thanks

DB