If you have a domain controller and the SYSVOL is missing you will be getting the following error in your logs:
Event Type: Error
Event Source: Userenv
Event Category: None
Event ID: 1006
Time: 6:01:40 PM
User: NT AUTHORITY\SYSTEM
Windows cannot bind to orion.net.au domain. (Local Error). Group Policy processing aborted.
To get this fixed copy the SYSVOL folder of a healthy domain controller manually.
To get the domain controller to re-establish the shares properally and publish it under the domain namespace theres a trick to this which I will show you.
Navigate to the following registry key on the domain controller you just copied the SYSVOL to:
HKLM\SYSTEM\CurrentControlSet\Services\Ntfrs\Parameters\Backup/Restore\Process at Startup
Set the value of the BurFlags registry entry to D4.
Restart the Ntfrs service
The DC will now automatically share the SYSVOL and republish it under the domain namespace. Very handy!