Setup a new partition (E) and Users security group was a group that had full access. We allow users to remote desktop into the server to run a couple of apps. The Administrators security group on the domain has full access as well. I decided to take off the Users security group access since I don't want just anyone getting access to that drive. Not sure what that group is all about anyways. If I look at any domain account I don't see that they are part of the group, but if I look at the Users security group and look at Members I see all of the domain accounts. Anyway, I take off the Users security group and can no longer access the drive. I am an Administrator on the domain. Security says I have full access. I add the Domain Admins security group to the Security tab. Give it full access. Still nothing. I add myself with full access. I now can access the drive. What gives? It's like it doesn't recognize security groups except for the Users security group.