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Add Bulk Active Directory Users
PowerShell
https://sourceforge.net/projects/adbulkadmin/
This is a bulk administration tool for an AD administrator to administer a large number of Active Directory users.
You can use it to:
Check a large number of users
Create a large number of users
Reset a large number of users' passwords
Enable or disable a large number of users
Set a large number of users' properties
Check groups
Add users to group or remove users from group