How to Enable SMTP AUTH for an individual mailbox in Office 365

  1. Login Microsoft 365 admin center.
  2. Click on Users>Active users.

3. Find and select the user mailbox you want to work on.

4. Click Mail.

5. Under Email apps, click Manage email apps.

6. Under Manage email apps, check Authenticated SMTP.

7. Click Save to complete the settings.

Published by

Bob Lin

Bob Lin, Chicagotech-MVP, MCSE & CNE Data recovery, Windows OS Recovery, Networking, and Computer Troubleshooting on http://www.ChicagoTech.net How to Install and Configure Windows, VMware, Virtualization and Cisco on http://www.HowToNetworking.com