When using Bulk delete in the Azure AD admin center to delete multiple users, which user attribute(s) must be included in the uploaded file?

When performing a bulk delete of users in Azure AD, the system primarily identifies users by their unique User Principal Name (UPN). The uploaded CSV file for bulk delete operations requires only the UPN for each user you wish to remove. While other attributes like display name or usage location are important for user management, they are not necessary for the specific action of identifying and deleting a user in a bulk operation. Including additional, unnecessary attributes could lead to errors or be ignored by the system.