Hi all! Problem at a glance : 1 Windows 2003 Enterprise Server. 1 Windows Vista Ultimate client. The Windows 2003 has changed recently (new hardware/computer) so the client cannot log on to the new Domain (the domain has the same name., users etc. but it has lost the SIDs for the computers) How can I recover the client's SID so I will not change the profile settings on this particular workstation? thank you in advance... Let's go Hyper ...

You don't "recover" sids. You join the pc to a workgroup and then join to the new forest. You copy the local profile [or the one you want to use] to the new domain profile which is usually username.forestname. You may wish to rename the old domain profile so its not overwritten when you join the pc to the new forest

So, If we have a profile named "DOMAIN.USER" in our client PC and we re-join to the "new" domain/forest, we are gonna have the profile "NEWDOMAIN.USER" in our client PC. If we rename those two profiles, then I'm gonna be OK ? Goood... havent try it yet, but I will check it out.. Thanks. Let's go Hyper ...

"the domain has the same name" which means you will NOT have "NEWDOMAIN.USER" which is why it's recommended that the present profile domain.user be renamed since when you join the wkst to the forest you will have that profile overwritten.

I putted it wrong.. Old profile was : DOMAIN.USER new profile is : DOMAIN.USER001 (or something like that..) So I rename the new profile to "DOMAIN.USER" and the DOMAIN.USER rename it to , lets say "DOMAIN.USER_BKP" Let's go Hyper ...

given your example you would copy the contents of DOMAIN.USER to DOMAIN.USER001 which will overwrite the contents. Just renaming the profile will not work due to its associated sid.

Thank you all for your help ! Let's go Hyper ...