Changing DFS Referral Status to Disabled

I have an urgent need to perform hardware maintenance on one of our DFS file servers. It has been the primary server for user data. I've used the "Override referral ordering" to set this one as the "Last among all targets" in hopes that the connected clients would move to another server (which I've set to "First among all targets"). Unfortunately, it doesn't appear as though the clients are moving. New connections (reboot / login) are going to the correct server, but established connections are not.

Is there any way to force the clients to move without contacting everyone and asking them to reboot? I'm tempted to set the Referral Status for the server to "Disabled" but I don't know what will happen to existing connections.