515945 – Microsoft Purview: Data Loss Prevention for Microsoft 365 Copilot to safeguard prompts

Product:

Copilot, Microsoft 365 Copilot, Purview, Purview Communication Compliance, Purview compliance portal, Purview Data Loss Prevention

Platform:

Web, World tenant

Status:

In development

Change type:

Links:

MC1181998

Details:

We are expanding Microsoft Purview Data Loss Prevention for Microsoft 365 Copilot to safeguard prompts containing sensitive data. This real-time control helps organizations mitigate data leakage and oversharing risks by preventing Microsoft 365 Copilot, including pre-built agents in Microsoft 365 Copilot, from returning a response when prompts contain sensitive data or using that sensitive data for grounding in Microsoft 365 or the web.

Change Category:
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Scope:
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Release Phase:
General Availability

Created:
2025-10-17

updated:
2026-01-21

Public Preview Start Date

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Docu to Check

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MS workload name

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summary for non-techies**

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Direct effects for Operations**

Please, look at the most relevant linked item for details

explanation for non-techies**

Imagine you have a trusted assistant who helps you with your daily tasks. This assistant is incredibly efficient, but sometimes, without realizing it, they might share information that you consider private or sensitive. To prevent this, you set up some rules. For example, if someone asks the assistant a question that involves confidential information, the assistant knows not to answer or to be very careful about what they say.

This is similar to what Microsoft is doing with their Purview Data Loss Prevention for Microsoft 365 Copilot. Microsoft 365 Copilot is like a digital assistant that helps users with various tasks. However, when users input prompts that contain sensitive data, there is a risk that this information could be inadvertently shared or used inappropriately. To prevent this, Microsoft has expanded its Purview Data Loss Prevention tools to monitor these prompts in real-time. If the system detects sensitive data, it can stop the Copilot from responding or using that data in its operations.

Think of it as having a filter or a gatekeeper that ensures sensitive information doesn't slip through the cracks. This helps organizations protect their data and reduce the risk of data leakage, much like how you would protect your own personal information from being shared without your consent.