AD domain and forest functional levels
Microsoft's edit ·
Microsoft's commit message in MicrosoftDocs/windowsserverdocs · commit 34e26ba · +1 −1 lines · also on GitHub
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- Identify all your DCs hosting the Global Catalog (GC) and FSMO roles. Create and verify backups of these Active Directory Domain Services domain controllers before making changes.
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−- You must be a member of the Enterprise Admins group or equivalent to raise the forest functional level.
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+- You must be a member of the Enterprise Admins group or equivalent to raise the forest functional level.
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> [!NOTE]
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> Before you can promote a machine running Windows Server 2025 to a domain controller in an existing domain, that domain must also be at least at the Windows Server 2016 functional level.
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Microsoft's Markdown source from MicrosoftDocs/windowsserverdocs, © Microsoft Corporation, under CC BY 4.0. Changed lines with up to 3 unchanged lines around each; ChangeIntel kept this copy 10 Oct 02:30 UTC. The commit date is when the source changed, which can be hours or days before Learn published it.