*For this entry exists the more relevant or more recent entry MC1182689
check before: 2025-11-01
Product:
Copilot, Microsoft 365 admin center, Microsoft 365 Copilot, Microsoft Graph, Purview, Purview Communication Compliance, Purview compliance portal, Purview Data Loss Prevention
Platform:
Developer, Online, Web, World tenant
Status:
In development
Change type:
Admin impact, New feature, Updated message, User impact
Details:
Summary:
Microsoft Purview Data Loss Prevention (DLP) is expanding to support Microsoft 365 Copilot, preventing sensitive data in prompts from being used or returned in responses. Public preview starts mid-November 2025; general availability begins late March 2026. Admins can configure DLP policies via the Purview portal.
Details:
Updated November 12, 2025: We have updated the content. Thank you for your patience.
[Introduction:]
We are expanding Microsoft Purview Data Loss Prevention (DLP) to support Microsoft 365 Copilot, helping organizations safeguard prompts that contain sensitive data. This real-time control helps mitigate data leakage and oversharing risks by preventing Microsoft 365 Copilot-including pre-built agents-from returning a response or using sensitive data for grounding in Microsoft 365 or the web.
This message is associated with Microsoft 365 Roadmap ID 515945.
[When this will happen:]
Public Preview: We will begin rolling out in mid-November 2025 and expect to complete by late December 2025.
General Availability (Worldwide): We will begin rolling out in late March 2026 and expect to complete by late April 2026.
Change Category:
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Scope:
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Release Phase:
General Availability
Created:
2025-11-01
updated:
2025-11-12
Public Preview Start Date
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summary for non-techies**
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Direct effects for Operations**
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explanation for non-techies**
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change history
| Date | Property | old | new |
| 2025-11-12 | MC MessageTagNames | New feature, User impact, Admin impact | Updated message, New feature, User impact, Admin impact |
| 2025-11-12 | MC Summary | Microsoft Purview DLP will support Microsoft 365 Copilot to prevent sensitive data leakage by blocking Copilot responses to prompts containing sensitive information. Rolling out from November 2025 (preview) to April 2026 (general availability), admins can configure policies in the Purview portal to safeguard data. | Microsoft Purview Data Loss Prevention (DLP) is expanding to support Microsoft 365 Copilot, preventing sensitive data in prompts from being used or returned in responses. Public preview starts mid-November 2025; general availability begins late March 2026. Admins can configure DLP policies via the Purview portal. |
| 2025-11-12 | MC Last Updated | 11/01/2025 00:08:48 | 2025-11-12T19:45:45Z |
| 2025-11-12 | MC Messages | [Introduction:]
We are expanding Microsoft Purview Data Loss Prevention (DLP) to support Microsoft 365 Copilot, helping organizations safeguard prompts that contain sensitive data. This real-time control helps mitigate data leakage and oversharing risks by preventing Microsoft 365 Copilot-including pre-built agents-from returning a response or using sensitive data for grounding in Microsoft 365 or the web. This message is associated with Microsoft 365 Roadmap ID 515945. [When this will happen:] Public Preview: We will begin rolling out in mid-November 2025 and expect to complete by late December 2025. General Availability (Worldwide): We will begin rolling out in late March 2026 and expect to complete by late April 2026. | Updated November 12, 2025: We have updated the content. Thank you for your patience.
[Introduction:] We are expanding Microsoft Purview Data Loss Prevention (DLP) to support Microsoft 365 Copilot, helping organizations safeguard prompts that contain sensitive data. This real-time control helps mitigate data leakage and oversharing risks by preventing Microsoft 365 Copilot-including pre-built agents-from returning a response or using sensitive data for grounding in Microsoft 365 or the web. This message is associated with Microsoft 365 Roadmap ID 515945. [When this will happen:] Public Preview: We will begin rolling out in mid-November 2025 and expect to complete by late December 2025. General Availability (Worldwide): We will begin rolling out in late March 2026 and expect to complete by late April 2026. |
| 2025-11-12 | MC Title | Microsoft Purview | Data Loss Prevention for Microsoft 365 Copilot to safeguard prompts | (Updated) Microsoft Purview | Data Loss Prevention for Microsoft 365 Copilot to safeguard prompts |
| 2025-11-12 | MC How Affect | Who is affected:
Microsoft tenants with access to Microsoft 365 Copilot (free and paid), including E1, E3, and E5 license holders. Admins managing Microsoft Purview DLP policies for Microsoft 365 Copilot. Note: Licensing rollout will complete by December 2025. By then, all tenants will have access to this feature regardless of license tier. What will happen: Admins can configure DLP policies in the Microsoft Purview portal to restrict Copilot from processing prompts containing selected sensitive information types (SITs), including default and custom SITs. Prompts containing sensitive data will not receive Copilot responses and will not be used for external web search or internal Microsoft Graph grounding. Admins can also view DLP policy recommendations for Microsoft 365 Copilot in Data Security Posture Management: Screenshot 1 Screenshot 2 Important: At this time, DLP for Copilot policies do not support enforcement based on sensitive information types (SITs). Hence, no users will be impacted under SIT-based conditions. Admins need to create a new policy to enforce DLP for Copilot prompt based on SIT. | Who is affected:
Microsoft tenants with access to Microsoft 365 Copilot (free and paid), including E1, E3, and E5 license holders. Admins managing Microsoft Purview DLP policies for Microsoft 365 Copilot. Note: Licensing rollout will complete by December 2025. By then, all tenants will have access to this feature regardless of license tier. What will happen: Admins can configure DLP policies in the Microsoft Purview portal to restrict Copilot from processing prompts containing selected sensitive information types (SITs), including default and custom SITs. Prompts containing sensitive data will not receive Copilot responses and will not be used for external web search or internal Microsoft Graph grounding. By default, a DLP for Copilot policy to safeguard prompts are available in simulation mode. Admins can configure this default policy from the Purview portal or the Microsoft Admin Center. You can learn more about the Microsoft Admin Center experience in Message Center post MC1182689. Screenshot 1 Screenshot 2 Important: At this time, DLP for Copilot policies do not support enforcement based on sensitive information types (SITs). Hence, no users will be impacted under SIT-based conditions. Admins need to create a new policy to enforce DLP for Copilot prompt based on SIT. |
Last updated 1 month ago ago
