Hi,
I have created one GPO with some security settings suggested by our security team. The GPO contains only Computer Settings. I had to apply it to the OU with 80 computer accounts (Hyper-V servers). I have put those 80 computers in a Group and then add that group into the security filtering of that GPO. Then I linked that GPO to that specific OU, containing those servers.
Everything goes well for almost 15 days.
Then I thought that since the settings needs to be implemented to all the computers in that OU, I have deleted the group from security filtering and add "Authenticated Users" in the security filtering.
Once the replication done, I have lost connection to ALL computers in the entire domain. All Hyper-V host was down and I was not able to connect to ANY computers, including the DC as it was also the VM. I have accessed the physical host and took the console of DC and unlink that GPO from that OU which fixed the issue.
Now my question is, what exactly went wrong? I have just changed the security filtering to "Authenticated Users" from computers accounts. Why it was working when Computer accounts were added in the security filtering and why it wend down after I have added the "Authenticated Users" account. Anyhow we had to apply that GPO to all the computers inside that OU. Also there was not any User related settings in that GPO. Can someone please help me understand this?
Thanks!
Nilabh Verma