<p>We recently made modifications to our DNS server infrastructure, and as a result, encountered issues when connected via VPN. Specifically, the performance of Active Directory administration tools significantly slowed down when accessed over a VPN connection. This problem happens when the split tunnel is active and a DNS setting change occurs on the physical adapter, which is what happened in our case.</p>
<p><img class="alignnone size-full wp-image-4271" src="https://www.wincert.net/wp-content/uploads/2021/07/subscribe-3534409_640.jpg" alt="" width="640" height="412" /></p>
<p>To address this issue, follow these steps:</p>
<p>Open the registry editor (<strong>regedit</strong>) and navigate to the following registry key:</p>
<p>Copy code<br />
<strong>HKEY_LOCAL_MACHINE | Software | Policies | Microsoft | Windows NT | DNSClient</strong><br />
In the right pane, create a new <strong>REG_DWORD</strong> key named <strong>DisableSmartNameResolution</strong> with the value set to <strong>1</strong>.</p>
<p>Restart your machine, and the Active Directory tools should return to normal functionality.</p>
<p>If you prefer not to modify registry settings, there is an alternative solution. Create a shortcut for each Active Directory tool with the following variable:</p>
<p><strong>%SystemRoot%\system32\dsa.msc /server=192.100.x.y</strong><br />
The example above refers to the AD Users and Computers tool.</p>
<p>I hope this information is helpful. Comments are welcome.</p>