Restricted Group

Sie

Can someone tell me if the Restricted Group in AD works off the User Name or the SID for the User Name.

Cheers.

SRTMCSE

I'm pretty sure it's SID.

Sie

Another random question:

What could be happening if an account is renaming itself to USERIDCW:Bunch of numbers and semi colons.....`

Could it be related to renaming an ccount within a restircted group??