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Scheduled Service Change: MS Teams new URL and File protections

Event:
2025-11-07 09:00:00
Expected Duration:
2025-11-07 10:00:00
Status:
Closed
Brief Description:
Beginning in November 2025, Microsoft will deploy new file and URL protections for Microsoft Teams. This change will be deployed in stages, sometime during November or December.
User Impact:
When a malicious link is detected, Teams will automatically display a warning to both the sender and recipient. This helps reduce the risk of phishing attacks. Teams will automatically block messages that include weaponizable file types. This applies to both internal and external conversations.
Services Affected:
Collaboration Platforms
Subsites Affected:
Microsoft Teams
Full Description:
Beginning in November 2025, Microsoft will deploy new file and URL protections for Microsoft Teams. This change will be deployed in stages, sometime during November or December. 

When a malicious link is detected, Teams will automatically display a warning to both the sender and recipient. This helps reduce the risk of phishing attacks. Teams will automatically block messages that include weaponizable file types. This applies to both internal and external conversations.
CIT TDX ID:
2021923



Timeline of Changes

Description Current Status Date Time
Beginning in November 2025, Microsoft will deploy new file and URL protections for Microsoft Teams. This change will be deployed in stages, sometime during November or December. 

When a malicious link is detected, Teams will automatically display a warning to both the sender and recipient. This helps reduce the risk of phishing attacks. Teams will automatically block messages that include weaponizable file types. This applies to both internal and external conversations.
2025-11-06 11:23:49