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You will hopefully find this site is well-secured and I'm not interested in being hacked. I'm interested in learning about how people try to hack me, though.
What is this endpoint?
owa/auth.owa
Microsoft Outlook Web Access
What an attacker could do
This OWA forms-authentication handler is the target of credential-spraying and password-harvesting attacks, and version-specific responses help attackers fingerprint the Exchange build for follow-on ProxyLogon/ProxyShell exploitation.
How to defend it
Enforce MFA and lockout thresholds on forms auth, suppress version banners, keep Exchange patched, and place the auth endpoint behind a pre-authentication gateway.
Connect with the Security Engineer
Learn More
Want to dive deeper into this topic? Check out the official documentation.
Read Official Documentation