How ca I view the GUID associated with an Active Directory user under windows 7?
This is easy to do using Active Directory Users and Computers.
Click View > Advanced Features
Drill down to the user you want to know about and open the Properties.
Click the Attribute Editor tab
Scroll down to the "ObjectSID" attribute.
Connection -> Bind -> OK
Browse -> Search
Base DN : (this varies per environment)
Scope: Subtree (this does nested search)
Attributes : add "objectGUID"
That should do it.
The GUID is in an Active Directory attribute called objectguid.