http://blogs.technet.com/heyscriptingguy/archive/2004/12/03/how-can-i-determine-the-sid-for-a-user-account.aspxHey, Scripting Guy! How can I determine the SID for a user account? -- MD Hey, MD. For those of you whose eyes glaze over any time they see an acronym (not that we blame you), SID is short for Security Identifier. A SID is a unique ID string (e.g., S-1-5-21-1454471165-1004336348-1606980848-5555)en-USCommunityServer 2.1 SP1 (Build: 61025.2)