Each domain has a Safe Link policy applied to it.

Why This Matters

Safe Links is a key security feature in Microsoft 365 Defender that protects users from malicious URLs found in email messages and Office documents. If a domain within your tenant lacks a Safe Links policy, users in that domain are not shielded from phishing attacks or malware hosted on compromised websites. Administrators must ensure that every domain receives consistent protection to reduce the risk of credential theft and malware infection.

What Aether365 Checks

Aether365 verifies that every domain registered in your Microsoft 365 tenant has an assigned Safe Links policy. This check appears in your Aether365 dashboard under the microsoft-365 service checks, flagged as Medium severity if any domain is left unprotected.