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just run dcpromo as you normally would<br />
with no fsmo roles, as long as it can talk to other domain controllers, should be fine
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Hello All,<br />
<br />
I will be dismantling one of our branches. In this branch there is a lone DC Windows server 2008 R2, which eventually I will be removing physically, but before I plan to demote it. <br />
<br />
This server is on another AD site and is a Global Catalog server but does not hold any FSMO roles.<br />
<br />
What is the best way to demote it properly?
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Hello All,

I will be dismantling one of our branches. In this branch there is a lone DC Windows server 2008 R2, which eventually I will be removing physically, but before I plan to demote it. 

This server is on another AD site and is a Global Catalog server but does not hold any FSMO roles.

What is the best way to demote it properly?

how to properly demote a DC located on another site?

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.

Active Directory

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.