Enabling SMTP AUTH in Exchange Online

Enable SMTP AUTH in Exchange Online if you want to use the product's email sending and notification functions.
Note: For detailed instructions, see the Microsoft Learn site.
  1. In the Exchange admin center, disable security defaults for the entire organization and then enable SMTP AUTH.
  2. In the Microsoft 365 admin center, enable SMTP AUTH for the product administrator's mailbox.
Parent topic: Registering an Email Server