I have a new Windows 2008 R2 DC on my remote site. AD is replicated and I can see all of my users and groups. I just added an E drive which is fully accessible, however, the security permissions include my domain username, and the Administrators username. I don't want individual usrnames listed, so I deleted mine. All of a sudden, I cannot access the drive. I am part of the Administrators group (which has full access), so that makes no sense. I added in Domain Admins security group, which I am also a part of (with full access) and I still cannot access it. I then add my username and now I have full access. Why is it working this way?