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Legacy authentication

Concept

Older sign-in protocols such as IMAP, SMTP and older Exchange ActiveSync versions that do not support multifactor authentication and can therefore be used to bypass MFA; blocking them is a common baseline Conditional Access policy.

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Title graphic: Legacy authentication (Concept)
TypeConcept

Key points about Legacy authentication

Episodes about Legacy authentication

Harden Microsoft 365 Security Without User Friction

2025-11-03 · Video on YouTube

This episode dives deep into the foundations of Microsoft 365 security and why locking down your M365 tenant has never mattered more. The conversation opens with a look at what “Microsoft 365 security” truly means today: a constantly evolving mix of policies…

Harden Intune Deployment for Zero Trust Compliance

2025-12-05 · Video on YouTube

Microsoft Intune is a powerful endpoint management solution — but improper deployment can introduce serious security risks. Misconfigured policies, over-permissioned roles, and weak compliance settings often create hidden vulnerabilities that attackers can…

Harden Microsoft Teams Security and Guest Access

2025-12-03 · Video on YouTube

Your “private” Microsoft Teams channels are quietly bleeding data – and default settings are to blame. In this episode, we walk through real-world incidents where dormant guest accounts, synced libraries, and careless PII pastes turned Teams into a silent…

Detect Impossible Travel and Token Replay in Microsoft…

2025-12-19 · Video on YouTube

This episode plays out like a cybercrime thriller, exposing how today’s most dangerous breaches don’t smash doors—they’re invited inside. The investigation opens with a single click on January 12th. A polished phishing email doesn’t steal a password; it…

Service Principal Security

2026-05-12 · Video on YouTube

Learn why personal accounts create automation risk and how service principals, managed identities, least privilege, and monitoring improve cloud security.

2025-11-03 – Harden Microsoft 365 Security Without User Friction2025-12-03 – Harden Microsoft Teams Security and Guest Access2025-12-05 – Harden Intune Deployment for Zero Trust Compliance2025-12-19 – Detect Impossible Travel and Token Replay in Microsoft…2026-05-12 – Service Principal Security2025-112026-05
Timeline of episodes about Legacy authentication

Articles about Legacy authentication (1)

Glossary

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Sources

Maintained by Mirko Peters (Microsoft MVP) · Last updated: