Microsoft Purview: Data Loss Prevention for Microsoft Cowork
Microsoft Purview Data Loss Prevention (DLP) is expanding to Microsoft Cowork, enabling data security admins to use a single policy across Microsoft 365 Copilot and Cowork. The integration helps protect sensitive AI interactions by preventing the use of labeled knowledge sources,
DIGITAL SKILL WORKS LTD / 12 PANES
What it is
Microsoft Purview: Data Loss Prevention for Microsoft Cowork is a Microsoft 365 roadmap item published via Microsoft Release Communications. Current status: Rolling out.
What it does
Microsoft Purview Data Loss Prevention (DLP) is expanding to Microsoft Cowork, enabling data security admins to use a single policy across Microsoft 365 Copilot and Cowork. The integration helps protect sensitive AI interactions by preventing the use of labeled knowledge sources, blocking prompts that contain supported sensitive information types, and restricting sensitive prompts from being sent to Bing for web search.
Why you should care
Board
Security/compliance control — fund Steady before more seats.
CISO
Prioritise as Steady control; wire into IR and GRC evidence paths.
CFO
Map licence or consumption impact to the frozen value case; avoid seat spray.
Adoption
Pilot with a named cohort and measure changed work, not vanity clicks.
Suggested action
Wave 0 first: Security → GRC → Cost & Value → Licence → Adoption. Add to Horizon watchlist with an owner. Pilot only after Steady controls for the affected surface are in place.
12 Panes: 03 Horizon · 04 Security
Communication needed
- Security: Lead review; confirm control mapping before enablement.
- GRC: Update AI/agent register and evidence path; confirm DPIA triggers if personal data is in scope.
- FinOps: Forecast seat or credit impact; align to frozen value case.
- Adoption: Plan cohort messaging, clinics, and success measures.
- Comms: One story for board and staff — what changes, what does not, who owns risk.
Benefits
- May improve productivity on a specific Microsoft 365 surface when permissions and data quality allow.
- Roadmap visibility helps Horizon planning without guessing dates.
Risks
- Status and dates change; treat MRC as directional, not a contract.
- Enabling without Steady controls can amplify overshare or cost leakage.
- Preview or rolling features can change behaviour; fence exploration on Pane 12 Frontier.
Source
- MRC id: 570845
- Status: Rolling out
- Products: Microsoft Purview
- GA / disclosure: October CY2026
- Preview: September CY2026
- Platforms: Web
- Cloud instances: Worldwide (Standard Multi-Tenant)
- moreInfoUrls: —
- Open on Microsoft 365 Roadmap
Microsoft Release Communications / Microsoft 365 Roadmap (AI at Work). Content is subject to Microsoft API Terms of Use. Dates and status change; verify in the official roadmap before acting.