I have 2 dell sx270 usff pcs.
i have RISed one as the name "R6420"
When i come to do the other 270 machine which will be for room 47 it says it wants to be "R6420"
At this point the pc down in room 64 can't login and has to be rejoined to domain.
When doing the 2nd pc i'm using a username "R47"
We think it is GUID related.
I have done a sid change on the R6420