Configure Email for OAuth

Starting April 30, 2026, Microsoft requires OAuth authentication for SMTP. Basic authentication is no longer supported. To maintain compatibility with external SMTP servers, set the global email preference to SMTP and ensure all users have valid SMTP email addresses configured.

Set global email preference to SMTP

Configure the global email preference to use SMTP with OAuth.

  1. Go to System Administration > Settings > Email Settings.
  2. Select Use SMTP.
  3. In the Mode list, select oAuth.

  4. Enter the SMTP details from your organization’s SMTP or Exchange environment:

    • SMTP Client ID

    • SMTP Client Secret

    • SMTP Token URL

  5. To verify the configuration, enter a valid SMTP email address in Sender email, and then select Test.

    A global test email is sent to confirm SMTP connectivity.

Set user email addresses to valid SMTP addresses

All users must have a valid SMTP email address to send email from Desktop Client after April 30, 2026.

  1. Go to System Administration > Security > Users.

  2. Select the user whose email you want to configure.

  3. In Email address enter the user's SMTP email address.

  4. Select Ok.