Hi,
Today i will try to solve big ques between GUID and SID. Some
people think that GUID and SID are same. But they are not...
Every object in active directory e.g. user account, computer
account, printer etc are given SID, so that authentication can be
performed. This leads to the formation of ACL ( Acess Control
List).
GUID is 128 bit hexadecimal no. given to objects in AD. When new
object is formed SID is same as GUID. But GUID are always
unique.
When a user moves out of domain, then it's SID will change, but
GUID will not.
I hope now it solves the issue..
Dhruv