This post discuss an issue where DFS clients connect to out-of-site targets when IPv6 protocol has been partially disabled using an incorrect method. A DFS link replicated by DFSR was deployed. An in-site DFS namespace (DFSN) target called ContosoFS1 was deployed in branch site. It wasn’t long before branch site users started reporting slow performance access data on the DFS link. The 1st step was to determine what Active Directory site DFS clients resided, whether in-site targets existed in DFS referral and if the in-site target was Active Target of DFS client. To determine which site client thought it belonged to in Active Directory, we ran this command from the client’s command prompt: Nltest.exe /dsgetsite

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