Ensure modern authentication for Exchange Online is enabled

Why This Matters

Without modern authentication enabled, Exchange Online cannot enforce multifactor authentication or support certificate-based authentication. This leaves your organization vulnerable to credential theft and replay attacks, as legacy authentication protocols bypass critical security controls like conditional access policies.

What Aether365 Checks

This check verifies whether the OAuth2ClientProfileEnabled setting is set to True for your Exchange Online organization. It appears in the Aether365 dashboard under microsoft-365 checks as AE.1044.