New file protection in Teams chat and channels blocks unsafe content [MC1148540]
Posted inMicrosoft Teams

New file protection in Teams chat and channels blocks unsafe content [MC1148540]

Message ID: MC1148540 (Updated) Updated September 9, 2025: We have updated the content. Thank you for your patience.IntroductionMicrosoft Teams is introducing a new protection feature that blocks messages containing weaponizable file types—such as executables—in chats and channels. This helps reduce…
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(Updated) Microsoft Teams: Malicious URL Protection for Teams Chat and Channels [MC1148539]
Posted inMicrosoft Teams

(Updated) Microsoft Teams: Malicious URL Protection for Teams Chat and Channels [MC1148539]

Message ID: MC1148539 (Updated) Updated September 9, 2025: We have updated the content. Thank you for your patience.IntroductionMicrosoft Teams is introducing enhanced protection against phishing attacks by detecting and warning users about malicious URLs shared in Teams chats and channels.…
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New file protection in Teams chat and channels blocks unsafe content [MC1148540]
Posted inMicrosoft Teams

New file protection in Teams chat and channels blocks unsafe content [MC1148540]

Message ID: MC1148540 IntroductionMicrosoft Teams is introducing a new protection feature that blocks messages containing weaponizable file types—such as executables—in chats and channels. This helps reduce the risk of malware and file-based attacks by preventing unsafe content from being shared.…
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Microsoft Teams: Malicious URL Protection for Teams Chat and Channels [MC1148539]
Posted inMicrosoft Teams

Microsoft Teams: Malicious URL Protection for Teams Chat and Channels [MC1148539]

Message ID: MC1148539 IntroductionMicrosoft Teams is introducing enhanced protection against phishing attacks by detecting and warning users about malicious URLs shared in Teams chats and channels. This feature helps users make safer decisions before clicking potentially harmful links. This message…
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Microsoft Whiteboard: Azure to OneDrive migration progress update [MC1146823]
Posted inMicrosoft 365 apps

Microsoft Whiteboard: Azure to OneDrive migration progress update [MC1146823]

Message ID: MC1146823 Introduction The migration of Microsoft Whiteboard storage from Azure to OneDrive has begun and will reach all tenants by the end of August 2025. This change enhances data accessibility, security, and compliance by aligning Whiteboard storage with…
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Limiting onmicrosoft domain usage for sending emails [MC1143991]
Posted inExchange Online

Limiting onmicrosoft domain usage for sending emails [MC1143991]

Message ID: MC1143991 IntroductionTo improve email deliverability and reduce abuse, Microsoft is introducing outbound email throttling for default MOERA domains (e.g., contoso.onmicrosoft.com). These domains are intended for initial tenant setup and testing—not for regular email traffic. This change encourages organizations…
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