MC1187837 — Microsoft Defender for Office 365 Zero-hour auto-purge (ZAP) Teams protection capabilities to Defender for Office Plan 1

Starting January 6, 2026, Zero-hour auto-purge (ZAP) will be enabled by default in Microsoft Defender for Office 365 Plan 1, automatically moving malicious Teams messages to admin quarantine. Tenants can opt out before January 6, 2026, and admins manage quarantined content via the Security portal.