Tag: Pre-Windows2000CompatibleSecurity

May 06 2026

AD Fundamentals: Pre-Windows 2000 Compatible Group

This series of posts focuses on key Active Directory (AD) components that need to be secured in order to ensure AD security is leveled up. In this post, we focus on the often-misunderstood group called “Pre-Windows Compatible”. This domain-scoped group is created automatically in the Built-in root OU and is part of any Active Directory …

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