Clear Cached DNS Server Entries from Windows Clients

On occasion Windows clients will cache static DNS nameserver addresses. This issue can be identified by the following symptoms:

Symptoms

1. The Network Adapter is not pulling the correct DNS Nameservers from the DHCP Server
2. The Network Adapter is set to Dynamic but has the wrong IP addresses.

Solution

1. Open Regedit.
2. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Interfaces
3. Click through the Interfaces until you find a ProfileNameServer entry with set ip addresses.
4. Delete the ProfileNameServer entry.
5. Open a Command Prompt and run the following commands:
   1. ipconfig /release
   2. ipconfig /renew