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If you have a 2nd DC or can install a 2nd DC, move the Fismo roles to it, make sure your workstations point to it and run properly. Then take the 2nd DC out of service using the dcpromo process, format and reinstall.
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If you have a 2nd DC or can install a 2nd DC, move the Fismo roles to it, make sure your workstations point to it and run properly. Then take the 2nd DC out of service using the dcpromo process, format and reinstall.

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You can also virtualize it, format the source DC, install fresh Win OS and transfer all files and roles from the virtual instance.
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You can also virtualize it, format the source DC, install fresh Win OS and transfer all files and roles from the virtual instance.

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Thank you to ALL who responded to the question... I have the information that I need and will proceed. All answers were helpful (and similiar).. I awarded points based on the most &nbsp;informative and &quot;step by step&quot; content.
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Thank you to ALL who responded to the question... I have the information that I need and will proceed. All answers were helpful (and similiar).. I awarded points based on the most  informative and "step by step" content.

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Hi.. I am having to reformat our Domain controller and was wondering what would be the best way of reconnecting my Client workstations to this new DC and keeping thier profiles intact? - (or am I dreaming :) &nbsp;- Thanks for any help
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Hi.. I am having to reformat our Domain controller and was wondering what would be the best way of reconnecting my Client workstations to this new DC and keeping thier profiles intact? - (or am I dreaming :)  - Thanks for any help

Reformat Domain Controller

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.

Windows Server 2008

The Windows operating systems have distinct methodologies for designing and implementing networks, and have specific systems to accomplish various networking processes, such as Exchange for email, Sharepoint for shared files and programs, and IIS for delivery of web pages. Microsoft also produces server technologies for networked database use, security and virtualization.

Windows Networking

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.