Microsoft Teams defaults on messaging safety protections for uncustomized tenants in January 2026
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Microsoft Teams will turn on messaging safety features by default starting January 12, 2026, expanding protection against malicious content for tenants on default settings. The rollout adds weaponizable file type protection, malicious URL detection, and false-positive reporting, which can warn users, block dangerous files, and surface detection errors. Administrators who already customized these settings are unaffected, but default tenants need to review configurations before the deadline to avoid an automatic change.
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Timeline
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23.12.2025 15:23 1 articles · 5mo ago
Microsoft announces default Teams messaging safety protections
Initial DisclosureMicrosoft announced that Microsoft Teams will automatically enable messaging safety protections by default for tenants using the default configuration, while organizations that previously customized messaging safety settings will see no changes. The update adds weaponizable file type protection, malicious URL detection, and false-positive reporting to strengthen defenses against malicious content, with rollout scheduled to begin on January 12, 2026.
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- Microsoft Teams strengthens messaging security by default in January — www.bleepingcomputer.com — 23.12.2025 15:23
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23.12.2025 15:23 2 articles · 5mo ago
Teams default safety protections begin rolling out
Mitigation Patch UpdateStarting January 12, 2026, Microsoft Teams tenants still using the default configuration and without prior messaging safety changes will receive automatic activation of weaponizable file type protection, malicious URL detection, and false-positive reporting. After the rollout, suspicious URLs can trigger warning labels, dangerous file types will be blocked, and administrators who want different security parameters must save configuration changes before the deadline.
Show sources
- Microsoft Teams strengthens messaging security by default in January — www.bleepingcomputer.com — 23.12.2025 15:23
- Microsoft Teams strengthens messaging security by default in January — www.bleepingcomputer.com — 23.12.2025 15:23