Dispatch Centre Sending Issues for Microsoft Email Clients

Dispatch Centre Sending Issues for Microsoft Email Clients

If your Dispatch Centre has recently stopped sending emails, Basic SMTP AUTH being disabled by Microsoft is almost certainly the cause. Microsoft has been progressively disabling legacy Basic Authentication (username/password SMTP AUTH) across all M365 tenants.

To re-enable SMTP AUTH for the affected mailbox, your Microsoft 365 administrator will need to:
  1. Go to Microsoft 365 Admin Centre → Users → Active Users
  2. Select the user/mailbox being used by Vault to send email
  3. Go to Mail → Manage email apps
  4. Ensure Authenticated SMTP is ticked/enabled
  5. Save changes (can take up to 60 minutes to take effect)
If this doesn't resolve the issue, we have added functionality within Dispatch Centre to work with Microsoft Graph. See the Knowledge Base Article for full setup instructions.