Hi, I'm am in the process of migrating my old NT4 PDC to a Samba 3.2.5 with an Ldap backend. I have been following the instructions from http://www.samba.org/samba/docs/man/Samba-Guide/ntmigration.html At point 16 is says to try pdbedit -Lw This is the output I get: sid S-1-5-21-1979685110-1467996072-351907979-500 does not belong to our domain sid S-1-5-21-1979685110-1467996072-351907979-2998 does not belong to our domain sid S-1-5-21-1979685110-1467996072-351907979-3010 does not belong to our domain That's not what I expected. Does anyone know why this might be? I did remove /var/lib/samba/*tdb before I began. Point 17 works: net groupmap list Domain Admins (S-1-5-21-1979685110-1467996072-351907979-512) -> 512 Domain Users (S-1-5-21-1979685110-1467996072-351907979-513) -> 513 Domain Guests (S-1-5-21-1979685110-1467996072-351907979-514) -> 514 Domain Computers (S-1-5-21-1979685110-1467996072-351907979-515) -> 515 Administrators (S-1-5-32-544) -> 544 Account Operators (S-1-5-32-548) -> 548 Print Operators (S-1-5-32-550) -> 550 Backup Operators (S-1-5-32-551) -> 551 Replicators (S-1-5-32-552) -> 552 According to LDAP the SambaDomainName SID is S-1-5-21-900663976-1457140431-1537874043. Is there meant to be some correlation between the Domain SID and the group list? net rpc info -UAdministrator -S MyPDC Enter Administrator's password: Domain Name: OurDom Domain SID: S-1-5-21-900663976-1457140431-1537874043 Sequence number: 2946 Num users: 117 Num domain groups: 3 Num local groups: 0 Can anyone offer some guidance please? Thanks, Dp.