Forefront UAG DirectAccess Troubleshooting: 10071 - "A timeout occurred. The Microsoft Forefront UAG DNS64 service was not started."

Cause—On Forefront UAG activation, a timeout occurred and the Microsoft Forefront UAG DNS64 (DnsAlgSrv) service was not started.

Warning: Serious problems may occur if you modify the registry incorrectly using the Registry Editor or another method. These problems may require that you reinstall your operating system. Modify the registry at your own risk.

Solution 1—Ensure that DNS64 has not been disabled from the registry:

At an elevated command prompt, type reg query HKEY_LOCAL_MACHINE\SOFTWARE\WhaleCom\e-Gap\Configuration\DirectAccess\Overrides\ /v DNS64ConfigState. If the DNS64ConfigState registry value is not present, the command displays ERROR: The system was unable to find the specified registry key or value. If the DNS64ConfigState key is present, ensure that the value is set to 0.
At an elevated command prompt type net start dnsalgsrv.
When the service is started successfully, reactivate Forefront UAG.

Solution 2—Check the Windows Event Viewer for any Microsoft Forefront UAG DNS64 (DnsAlgSrv) related events and troubleshoot further.