

(can modify email IDs for both mailbox users and mail enabled users). Choose the Modify SMTP Address option.On selecting all the mailboxes, click on Apply for the changes to reflect. Browse and import the CSV files containing the details of the mailbox user and modified user names.Select the corresponding Microsoft 365 Tenant.Choose the Mailbox Naming Attribute Changes option.


If you wish to change a user’s display name or email address, you can do so using Microsoft 365 admin center by navigating to Users > Active users > Account tab.
