Bulk deletion of users in Entra ID
Microsoft has a great guide on how to bulk delete users using Entra admin center
This process of deleting users in bulk is quick (5 minutes), easy and safe to use.
When you export a list of users from User Details Table to excel format, verify the list once more and copy the User Principal Name column (except from column header and bottom row) into column A from line 4 in the CSV template referred to in the Microsoft documentation.
Follow the instructions in the documentation.
Tip to verify deleted users:
Sign in to the Microsoft Entra admin center as at least a User Administrator.
Select Microsoft Entra ID.
Click Users and then Deleted users
It may take a few minutes for the Microsoft Entra ID admin center to show the recently deleted users
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