I am trying to move our old Windows 2003 File Server to Windows 2008 R2.

What I have noticed, however, is that the entries for groups in the ACL are being ignored.

For example, a user is part of a group in active directory. If I create a folder and enable full access for this group, then share this folder (and define sharing permissions for this group), users in that group do not get access to that folder.

If I make an entry in the ACL for the user itself, it works perfectly.

These even applies to my domain administrator account - If I create a folder and give full control to the local administrators group / domain administrators group, and I physically log on to the server, I still do not get access - I need to explicitly define my name to proceed.

I am not sure what the problem is, tried looking it up in Google to no avail

Any assistance will be greatly appreciated