AD functional level upgrade planning

This page's changes and edits · All guidance changes

Microsoft's edit · 11 Mar 12:19 UTC

New Upgrade in-place article

Microsoft's commit message in MicrosoftDocs/windowsserverdocs · commit b30432e · +3 −3 lines · also on GitHub

⋯ 24 unchanged lines

2525

2626 Consider the following items when assessing your current environment:

2727

28 −- Your domain controllers meet or exceed the hardware requirements for the operating system that you plan to upgrade to. To learn more about hardware requirements, see [Perform a Feature Update of Windows Server](../../../get-started/perform-in-place-upgrade.md).

28 +- Your domain controllers meet or exceed the hardware requirements for the operating system that you plan to upgrade to. To learn more about hardware requirements, see [Perform a Feature Update of Windows Server](../../../get-started/upgrade-in-place.md).

2929

3030 - Your Active Directory domain is operational and free from replication errors. To learn more about replication errors, see [Diagnose Active Directory replication failures](/troubleshoot/windows-server/active-directory/diagnose-replication-failures).

3131

⋯ 29 unchanged lines

6161

6262 - Introduce new Windows Server 2025 domain controllers into the forest, then retire or upgrade all domain controllers running an older version of Windows Server. After you've upgraded or retired all domain controllers running an older version of Windows Server, you can raise the domain and forest functional levels to Windows Server 2025.

6363

64 −- Perform a Feature Update of all existing domain controllers running an older version of Windows Server. To learn more about performing a Feature Update, see [Perform a Feature Update of Windows Server](../../../get-started/perform-in-place-upgrade.md). Then raise the domain and forest functional levels to Windows Server 2025.

64 +- Perform a Feature Update of all existing domain controllers running an older version of Windows Server. To learn more about performing a Feature Update, see [Perform a Feature Update of Windows Server](../../../get-started/upgrade-in-place.md). Then raise the domain and forest functional levels to Windows Server 2025.

6565

6666 A Windows Server 2025 domain controller can only be added to an existing domain that is running Windows Server 2016 Domain Functional Level or newer version. You must also ensure that all hardware and software requirements for Windows Server 2025 are met.

6767

⋯ 13 unchanged lines

8181

8282 - Introduce new Windows Server 2016, 2019 or 2022 domain controllers into the forest, then retire or upgrade all domain controllers running an older version of Windows Server. After you've upgraded or retired all domain controllers running an older version of Windows Server, you can raise the domain and forest functional levels to Windows Server 2016.

8383

84 −- Perform a Feature Update of all existing domain controllers running an older version of Windows Server. To learn more about performing a Feature Update, see [Perform a Feature Update of Windows Server](../../../get-started/perform-in-place-upgrade.md). Then raise the domain and forest functional levels to Windows Server 2016.

84 +- Perform a Feature Update of all existing domain controllers running an older version of Windows Server. To learn more about performing a Feature Update, see [Perform a Feature Update of Windows Server](../../../get-started/upgrade-in-place.md). Then raise the domain and forest functional levels to Windows Server 2016.

8585

8686 ## Upgrade functional levels in a previous version of Windows Server

8787

⋯ 1 unchanged line

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 07:21 UTC. The commit date is when the source changed, which can be hours or days before Learn published it.