Active Directory Forest & Domain Levels

An important Active Directory setting determines what security capabilities are available which relates to the level of the forest and/or domain. This post is meant to collect the relevant capabilities of Windows domain and forest functional levels. Forest Functional Level Features: Domain Functional Level Features: References: https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/cc754918(v=ws.10) https://learn.microsoft.com/en-us/windows-server/identity/ad-ds/active-directory-functional-levelsActive Directory & Azure AD/Entra ID SecurityRead More