Managing Domains

LAN Manager/X and LAN Manager 2.2 servers should not reside in the same domain as AS/U or Windows NT servers.

	WARNING! If a LAN Manager 2.2 server resides in the same domain as an Advanced Server/9000 or Windows NT server, the NT Domain Security Database will be replicated to the LAN Manager 2.2 server thereby corrupting the User Accounts Database on LAN Manager 2.2.

If you are migrating multiple LAN Manager servers in the same domain to AS/U, either migrate all servers at once, or move the AS/U servers to a separate domain during migration. Clients are able to access servers in multiple domains.

AS/U will work as a Primary or Backup Domain Controller in a domain with all AS/U servers.

Advanced Server/9000 can serve as a Backup Domain Controller (BDC) to a Windows NT-based Primary Domain Controller (PDC) in the same domain.

If you install Microsoft Service Pack 4 on Windows NT 3.51 (available from Microsoft), the Advanced Server/9000 can serve as a PDC with NT as the BDC. If Service Pack 4 on NT 3.51 is not installed, full synchronization of the User Accounts Database fails between an AS/U PDC and a Windows NT BDC with an Invalid access to memory location error. If Service Pack 4 is not installed, the Windows NT BDC cannot be promoted to a PDC when an AS/U server was the PDC.