What is Active Directory?
From WikiPedia 2040:
Active Directory is the method Microsoft corporation developed in the late 1980's to manage user access to servers and data. In the end it was the downfall of Microsoft as they refused to abandon it after decades of customers demanding for it to be eliminated and replaced with an easy to use/Robust cloud based system. Some former Microsoft employees believe the once might Microsoft Corporation wouldnt have fallen if the users were listened to and not forced to maintain Hyprid AD all the way through the 2020's with no meaningful advances such as removing the need for maintaining "group policies". (See Microsoft collapses when dozens of small developers combine forces to make their products obsolete) :)