Question : Local system failed to contact active directory

I am stuck.
Fairly large operation. Main office and a few sub locations all running VPN mesh. Each location has one AD controller there for domain authentication and login. One of these locations has 8 or so computers. Two of these computers suddenly have this problem.

Each morning, the users cannot login and have to reboot there system (two in total)  in order to get past domain login procedure.
Errors:
EventID 15: Autoenrollment. Automatic certificate enrollment for local system failed to contact active directory (0x8007054b). The specified domain either does not exist or could not be contacted
and
EventID 1054: Userenv. Windows connect obtain the domain controller name for your computer network (the specified domain either does not exist or could not be contacted Group polucy processing aborted.

On reboot of the two systems, all is well, and the other computers have no issue.
I have DHCP running on the network and all workstations are pulling from it. I have gpedit.msc on these two computers and turned off autoenrollment with no success.
I have checked all DNS settings, WINS, AD controller replication, name resolution, VPN operation and registration of users, computers and AD controllers without finding a solution.

Any ideas?

Answer : Local system failed to contact active directory

1) Disable the firewall
2) Remove the system from domain and restart the system.
3) Change the hostname and restart the system
4) Add the system back to domain and restart the system.
5) Login and run 'gpupdate /force' (reboot if required)

Hope this helps.