Copilot Data & Privacy Issues

How to Connect a Custom Security Analysis Service to Microsoft Copilot

Maira Mehtab Sep 20, 2026 869 views

Question details

Organizations need a method to analyze Copilot prompts and responses for personally identifiable information (PII) and sentiment using a custom external text-analysis service.

Product: Microsoft Copilot
Device & OS: not provided
Scenario: Implementing custom security layers and data filtering for enterprise Copilot usage to prevent sensitive data leakage.
Observed behavior: Standard Microsoft Copilot deployments do not natively route requests through custom third-party security analysis services before processing prompts.

Before you start

Ensure you have the necessary development resources to build and deploy middleware services, along with access to the API documentation of your preferred custom text-analysis tool.

Solution 1Recommended

Build a Middleware or Proxy Service

Develop an intermediate proxy service to intercept communication between users and Copilot for necessary security and PII checks.

To achieve custom security analysis, you must position a middleware service between the end-user and the Copilot API. This allows your organization to exert complete control over the data flowing into and out of the language model.

Set up the interceptor

Deploy a middleware server configured to intercept all outgoing user prompts intended for Microsoft Copilot.

Send data to the analyzer

Program the proxy to route the intercepted prompt text to your custom PII and sentiment analysis service.

Apply security rules

Implement logic to apply filtering, redaction, or modification rules based on the results returned by your text analyzer.

Forward to Copilot

Forward the sanitized and approved request to the Microsoft Copilot endpoint.

Inspect the response

Capture the returning response from Copilot and pass it through the same analyzer to ensure no sensitive data is returned before delivering the final output to the user.

Development Requirement: This solution requires custom software development and infrastructure deployment to host the proxy service securely.

Solution 2

Consult the Microsoft Q&A Developer Community

Seek detailed architectural and implementation guidance from Microsoft experts for complex integrations.

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Frequently Asked Questions

Can I connect a third-party PII scanner directly within Microsoft Copilot settings?

No, Microsoft Copilot does not currently offer a native settings menu to route prompts through external third-party analysis services. It requires building a custom middleware or proxy service.

What is the primary function of a proxy service for Copilot?

A proxy service acts as a gatekeeper, allowing organizations to analyze prompts and responses for PII and sentiment, ensuring that sensitive data is filtered, blocked, or redacted before reaching the AI model or the user.

Where can I find architectural support for building Copilot middleware?

You can find detailed architectural guidance and support by posting your integration questions in the official Microsoft Q&A developer community, where Microsoft engineers and experienced developers can assist you.

Microsoft Copilot Issues