Solution
To be able to send notification to your M365 tenant from MetaDefender ICAP Server, the following fields should be configured properly under MetaDefender ICAP Server:
Server: smtp.office365.com
Port: 587
Connection type: TLS
Auth Method: Auth Login
Email: Email address for sender of notification, it should be a real mailbox which is licensed on M365 side.
Username: username of the mailbox provided under “email” field.
Password: password of the mailbox provided under “Email” field.
More details about M365 URLs can be found checking following link: Microsoft 365 URLs and IP address ranges - Microsoft 365 Enterprise | Microsoft Learn
Example:
IMPORTANT: To complete the configuration, the following settings should be reviewed on the M365 mailbox account:
- Ensure that SMTP AUTH is enabled in your organization
- Verify that “Authenticated SMTP” is enabled per mailbox in scope
Please check the following article to see how this can be done: Enable or disable SMTP AUTH in Exchange Online | Microsoft Learn
