Its seems pcs is some locations no longer join the domain anymore. These are in locations where there is not a specific dc for that site so guess could be related with that. Error is --->Failed to get DC with code (54b): The specified domain either does not exist or could not be contacted. You can add/remove pcs to and from the domain from the full os fine, any ideas ?

what does your c:\windows\debug\netsetup.log say ? My step by step SCCM Guides I'm on Twitter > ncbrady

12/29/2010 16:47:05:329 ----------------------------------------------------------------- 12/29/2010 16:47:05:329 NetpDoDomainJoin 12/29/2010 16:47:05:349 NetpMachineValidToJoin: 'MININT-8RCIHJH' 12/29/2010 16:47:05:369 OS Version: 6.1 12/29/2010 16:47:05:369 Build number: 7600 (7600.win7_rtm.090713-1255) 12/29/2010 16:47:06:160 SKU: 12/29/2010 16:47:06:320 NetpGetLsaPrimaryDomain: status: 0x0 12/29/2010 16:47:06:320 NetpMachineValidToJoin: status: 0x0 12/29/2010 16:47:06:320 NetpJoinWorkgroup: joining computer 'MININT-8RCIHJH' to workgroup 'WORKGROUP' 12/29/2010 16:47:06:320 NetpValidateName: checking to see if 'WORKGROUP' is valid as type 2 name 12/29/2010 16:47:06:420 NetpCheckNetBiosNameNotInUse: for 'WORKGROUP' returned: 0x858 12/29/2010 16:47:06:420 NetpCheckNetBiosNameNotInUse for 'WORKGROUP' [ Workgroup as MACHINE] returned 0x858 12/29/2010 16:47:06:420 NetpValidateName: name 'WORKGROUP' is valid for type 2 12/29/2010 16:47:06:531 NetpSetLsaPrimaryDomain: for 'WORKGROUP' status: 0x0 12/29/2010 16:47:06:551 NetpJoinWorkgroup: status: 0x0 12/29/2010 16:47:06:551 NetpDoDomainJoin: status: 0x0

anyone any ideas ? It seems at any site where there is not a local dc, pcs are not able to join the domain. OSD with XP works ok though, so maybe something to do with the UDI task sequence and windows 7 ? it says invalid credentials for joining the domain but the credentials are fine.

Have you tried joining 1 of the win7 computers manually to the domain with the same credentials ? Are you joining the machines using the Netbios or FQDN name ? And if the latter is your DNS properly configured in the locations without a DC ?

I can join the pcs to the domain fine manually with the same credentials. I am using FQDN name, DNS looks fine, I will find all the relevant network settings from a pc that joins and ompare that to one that doesnt.

So I needed to use domainname.com\username .. not domainname\username in the end ..