Is Microsoft Copilot safe to use with company data?
Microsoft 365 Copilot is safe for company data and inherits your tenant's compliance boundary — but free/consumer Copilot does not, so the risk depends entirely on which Copilot your staff actually use.
Does Microsoft Copilot train on your data?
Microsoft 365 Copilot does not use your prompts or tenant data to train foundation models and respects existing permissions. Free Copilot (consumer) does not offer the same commercial protections.
The enterprise option
Microsoft 365 Copilot operates inside your Microsoft 365 compliance boundary (Purview, DLP, eDiscovery, conditional access).
Data processing agreement (DPA)
Covered by the Microsoft Products and Services DPA for commercial customers.
The real risks for Microsoft customers
- Staff may use the free consumer Copilot instead of the licensed M365 version.
- Copilot surfaces data the user can already access — over-permissioned files become exposure.
- Web-grounded prompts can send context outside the tenant.
What never to paste into Microsoft Copilot
- Data the recipient model isn't contracted to handle
- Regulated PII outside the tenant boundary
- Secrets and credentials
- Confidential M&A or legal material
Protect it automatically
PII Guardrail detects and masks sensitive data on-device before it reaches Microsoft Copilot — then restores it in the response. Or assess your company's whole AI exposure in two minutes.