Hi Update a test network running OES11 to OES11 SP1 but am seeing an issue with DSFW that I can no longer administrator it from MMC and workstations are a lot slower to connect.

The error I get is

naming information cannot be located because:
The RPC server is unavailable.
Contract your system administrator to verify that your domain is property configured and is currently online.

I have tried to manually select the DSFW server but it still doesn't work. Any ideas on what I can look for?

thanks in advanced.