How to Change an Internal Domain Name

You can change your domain name anytime. However, before you change your domain name, make sure that you make backups, since this change in domain name will wipe away all of your files on the sever.

In Windows, the domain name is recognized by the Security Identifier (SID) as well as the NetBIOS. Usually the ACL's (Access Control Lists) as well as a few other Windows NT security features recognize the SID as a domain name, and hence changing the domain name can cause a bit of disruption to other network services.

A few steps mentioned here will help you learn how to change the domain name in Windows NT. These steps can be performed for a single domain, accounts domain as well as a resource domain.

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Instructions

- 1
  
  Before changing the domain name, you will need to document and then break all trust relations between other domains and the one you are changing. Trust entry on both sides of the trust should be broken (in User Manager for Domains for both domains in the trust).
- 2
  
  Stop all BackOffice services, including Microsoft Exchange Server, SQL Server, and Internet Information Server. Set all such services to startup mode "manual."
- 3
  
  Change the name of the domain on the PDC to the desired name.
- 4
  
  After the PDC is restarted, the entry for the new domain <1Bh> will then appear in the WINS server.
- 5
  
  If you are using WINS for NetBIOS over TCP/IP name resolution, force a replication from the PDC's main WINS server to all other WINS servers. This will spread the <1Bh> entry for the new domain throughout. Each BDC requires PDC name resolution to change the domain name. If you are using TCP/IP without using WINS, create an LMHOSTS file with a <1Bh> entry for the new domain and put it on each BDC.
- 6
  
  Rename the domain for each BDC and then restart each. This allows the BDC to register its <1Ch> entry with WINS.
- 7
  
  Force replication from all WINS servers to propagate the <1Ch> entry and renew trust relations. Synchronize both domains using Server Manager in each trust.
- 8
  
  In the Services tool in Control Panel, re-enter the service account for each of the BackOffice services. Restart the services in the correct order.
- 9
  
  Change the domain name on each member server or workstation.

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How to Change an Internal Domain Name

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