Alternatively chosen filtering solutions SHOULD offer services comparable to Microsoft Defender's Common Attachment Filter.

Why This Matters

If your organization uses a third party email filtering solution that does not match the capabilities of Microsoft Defender's Common Attachment Filter, malicious file attachments may bypass security controls. Attackers frequently use email attachments containing malware or ransomware to gain initial access. Ensuring your alternative solution provides comparable protection is critical to preventing these common attack vectors.

What Aether365 Checks

Aether365 verifies that any alternatively chosen email filtering solution for your Microsoft 365 environment offers services comparable to Microsoft Defender's Common Attachment Filter. This check appears in your Aether365 dashboard under microsoft-365 checks.