Outlook is configured to display external tags for external emails.

Why This Matters

External email tagging helps users quickly identify messages originating from outside your organization, reducing the risk of phishing and impersonation attacks. Without this visual cue, users may inadvertently treat malicious external emails as trusted internal communications. Enabling external tags is a foundational security practice that reinforces user awareness and complements other email protection measures.

What Aether365 Checks

This check verifies that your Microsoft 365 tenant has been configured to display external sender tags in Outlook for all inbound emails from outside your organization. It appears in the Aether365 dashboard under the microsoft-365 checks category with severity Medium.