An Active Directory structure is a hierarchical arrangement of information about objects. The objects fall into two broad categories: resources (eg, printers) and security principals (user or computer accounts and groups). Security principals are assigned unique security identifiers (SIDs). ADManager Plus provides information on different active directory objects as reports, and allows you to view, analyze the information from here itself. Ex: You can get the list of all inactive users from the inactive users report and modify the account status to active from the reports itself.

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The original article/video can be found at Active Directory Objects – ADManager Plus