What are the steps to move the DC in production site after demotion?

Moving a domain controller (DC) in a production environment after demotion typically involves the following steps:

1. Ensure that the DC has been properly demoted: Before you can move a DC, you must ensure that it has been properly demoted and is no longer a domain controller. This involves running the dcpromo utility to remove Active Directory Domain Services (AD DS) from the server. It is important to follow the proper procedures for demoting a DC to avoid any potential issues.
2. Remove the DC from any Active Directory sites: If the DC is a member of an Active Directory site, it should be removed from the site before it is moved. This will ensure that the site topology is updated to reflect the DC’s removal and prevent any potential replication issues.
3. Check network connectivity: Before moving a DC, you should ensure that it has a stable network connection and can communicate with the other domain controllers in the environment. This can be done by verifying the IP address and subnet mask settings, checking the network cables and switches, and running network diagnostics if necessary.
4. Update DNS settings: If the DC’s IP address or DNS settings have changed, you should update them to reflect the new configuration. This can be done by updating the DNS server settings on the DC itself, as well as any other servers or devices that rely on the DC for DNS resolution.
5. Move the physical server: Once you have taken the necessary steps to prepare the DC for relocation, you can physically move the server to its new location. This may involve shutting down the server, disconnecting it from the network and power source, and physically transporting it to the new location.
6. Reconnect the server to the network: After the server has been moved, you should reconnect it to the network and ensure that it has a stable network connection. This may involve connecting the network cables, configuring network settings, and verifying connectivity.
7. Update DNS and Active Directory site information: Once the server has been reconnected to the network, you should update the DNS and Active Directory site information to reflect the DC’s new location. This can be done by updating the DNS server settings on the DC itself, as well as any other servers or devices that rely on the DC for DNS resolution. You may also need to update the site topology in Active Directory Sites and Services.
8. Promote the DC: If the DC is to be used as a domain controller again, you should run the dcpromo utility to promote it. This will install AD DS on the server and make it a domain controller again.
9. Verify replication: Finally, you should verify that replication is working correctly between the moved DC and the other domain controllers in the environment. This can be done by checking the replication status in the Active Directory Replication Status Tool (ADREPLSTATUS) or by running the repadmin /showrepl command.

Moving a domain controller can be a complex process, and it is important to plan and execute the move carefully to avoid any potential issues. It is recommended to consult with an experienced IT professional or Microsoft support before attempting to move a domain controller in a production environment.

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