check before: 2025-10-01
Product:
Entra, Microsoft 365 Apps, Microsoft Loop, OneDrive, SharePoint, Teams, Windows
Platform:
Mac, Online, Web, Windows Desktop, World tenant
Status:
Rolling out
Change type:
Feature update, Admin impact
Links:
Details:
Summary:
Microsoft Teams now enables automatic file and Loop component sharing by default in external 1:1, group, and meeting chats, improving collaboration. Admins can disable this via policy. Guest users can share files from their home tenant. Rollout starts October 2025, completing worldwide by January 2026.
Details:
[Introduction]
We're improving external collaboration in Microsoft Teams by enabling file attachments and Loop sharing in 1:1, group and meeting chats with external users. This update improves the collaboration experience for Files and Loop and add a new control for IT admins. Specifically, Files and Loop components will be shared automatically with external participants in the chat and won't require any action by the sender by default. Additionally, Entra B2B Guests in your organization will be able to attach and share files from their home tenant's OneDrive or SharePoint.
This change applies to Teams for Windows desktop, Mac desktop, and web and is associated with Roadmap ID 492625.
Screenshot 1: Files are automatically provisioned.
Screenshot 2: Files shared have an external label and always open on Web.
[When this will happen:]
Targeted Release: Rollout begins late October 2025; expected to complete by mid-November 2025
General Availability (Worldwide): Rollout begins mid-January 2026
Change Category:
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Scope:
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Release Phase:
Standard Release
Created:
2025-10-31
updated:
2025-10-31
Task Type
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Docu to Check
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MS How does it affect me
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MS Preperations
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summary for non-techies**
Microsoft Teams is introducing a feature that simplifies sharing files and Loop components with external users in chats, allowing automatic sharing without manual adjustments, while still giving IT administrators the option to disable this feature for more control.
Direct effects for Operations**
Automatic File Sharing in External Chats
Users may unintentionally share sensitive or confidential files with external parties, leading to potential data breaches or compliance issues.
- roles: IT Admin, Compliance Officer
- references: https://learn.microsoft.com/powershell/module/microsoftteams/set-csteamsmessagingpolicy?view=teams-ps#-autosharefilesinexternalchats, https://learn.microsoft.com/powershell/module/teams/set-csteamsfilespolicy?view=teams-ps#-filesharinginchatswithexternalusers
User Experience with External Collaboration
Users may face confusion or frustration if they are unaware of the automatic sharing feature, leading to miscommunication and potential operational disruptions.
- roles: End User, Team Leader
- references: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=492625, https://learn.microsoft.com/sharepoint/sharepoint-azureb2b-integration
Increased Administrative Overhead
IT Admins may need to spend additional time managing permissions and educating users about the new sharing capabilities, impacting overall productivity.
- roles: IT Admin, Support Staff
- references: https://learn.microsoft.com/powershell/module/microsoftteams/set-csteamsmessagingpolicy?view=teams-ps#-autosharefilesinexternalchats, https://learn.microsoft.com/powershell/module/teams/set-csteamsfilespolicy?view=teams-ps#-filesharinginchatswithexternalusers
Configutation Options**
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Opportunities**
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Potentional Risks**
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Data Protection**
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IT Security**
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Hypothetical Work Council Statement**
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DPIA Draft**
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explanation for non-techies**
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** AI generated content. This information must be reviewed before use.
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Last updated 2 weeks ago ago
