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DFS not mapping correctly

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Last Modified: 2012-05-10
We have a client with two locations that have a mapped network drive that syncs with each other thru DFS.

Both servers are running Windows Server 2003 R2 Service Pack 2.

The problem is as follows:
Users in site A have their mapped drive resolving to the server in site B and vice versa, users in site B have their mapping point to the server in site A.

Users are able to correct the mapping manually and it will stick for periods of time but frequently if workstations are rebooted or seemingly at random during the day the mapping flips back to the wrong site.

Their bandwidth is affected by the incorrect mappings and users report network access to files and folders to noticeably slow down.

As part of our testing we applied the following MS hotfix to two workstations most affected by the issue:
http://support.microsoft.com/kb/944505/en-us

We have not applied the hotfix to either server yet.

How can we make the mappings stick to the correct site and not flip back to the wrong site?

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