Purpose-built legal tools for Word
Microsoft has announced the development of legal plugins for its Copilot AI assistant, specifically for use within Word. These plugins are intended to provide tools for tasks that are common in legal departments, such as summarising long contracts, drafting clauses, and redlining documents—the process of marking up changes and edits during negotiations.
While Copilot already offers general writing assistance, these new plugins are designed to understand legal terminology and formatting. The system will be able to draw information from your existing Microsoft 365 environment, such as past templates or emails, to ensure the output matches your firm's previous work.
Integration with third-party sources
A notable feature of this update is the ability to connect to third-party legal sources. This means the AI may be able to cross-reference your documents against external legal databases or case law libraries. Microsoft has not yet confirmed which specific third-party providers will be supported at launch.
The tools will also be available in Cowork, which is Microsoft's collaborative workspace for professional services. This suggests a focus on multi-user review of complex legal files.
Timeline and requirements
Business owners should note that this feature is not yet available. A preview is scheduled for April 2026, with general availability expected in October 2026. This long lead time suggests that the integration of specialised legal data requires significant testing for accuracy and compliance.
To use these plugins when they arrive, your business will likely need an active Microsoft 365 business subscription and a separate Copilot licence. You will also need to ensure that your internal data is organised correctly within the Microsoft cloud so the assistant can find the relevant context.
Data privacy considerations
For legal professionals, data sovereignty and confidentiality are high priorities. While Microsoft states that data used by Copilot remains within your organisation's tenant, firms should monitor the specific compliance certifications for these legal plugins as more information is released closer to the 2026 launch date.