Cybersecurity Briefing — CISA Emergency Directive 20-03 mandates Microsoft 365 hardening
CISA issued Emergency Directive 20-03 on 18 May 2020 requiring federal agencies to implement Microsoft 365 security configurations to mitigate credential theft and improper access control.
On 18 May 2020 the Cybersecurity and Infrastructure Security Agency published Emergency Directive 20-03, ordering U.S. federal civilian agencies to enforce MFA, disable legacy authentication, restrict Power Platform service principals, and review privileged roles across Microsoft 365 tenants.
Security teams should mirror the directive's checks—tightening identity controls, auditing mailbox forwarding, and monitoring OAuth apps—to reduce account takeover risk in shared collaboration environments.
Continue in the Cybersecurity pillar
Return to the hub for curated research and deep-dive guides.
Latest guides
-
Cybersecurity Operations Playbook — Zeph Tech
Use Zeph Tech research to align NIST CSF 2.0, CISA KEV deadlines, and sector mandates across threat intelligence, exposure management, and incident response teams.