Reverse lookup a SID

[Kool]

I am using a SID and I want to lookup what user account it corresponds to. Can anyone tell me what tools I can use to do this things? Thank you.

[anshusehgal]

Incase you are noticing it as a long string of numbers where an account or group name should be, then there is an error in replication or a group / username that has been removed from active directory.