Microsoft makes Copilot for legal generally available on commercial licenses

On 15 October 2026, the Copilot Blog published Introducing Microsoft Copilot for legal. The page time is 08:00 Pacific (15:00 UTC). The stored byline is the login DrenaK. The post announces general availability of more than 20 legal skills and new partner plugins. It says work previously introduced as Legal Agent now ships as legal plugins: document work in Word, multi-step work in Cowork, and connections to systems legal teams already use.

The closing line says the capabilities “are generally available to Microsoft Copilot customers worldwide today.” Microsoft Support is narrower: Copilot in Word and Cowork, for Microsoft 365 Copilot commercial subscribers, with an active commercial license required. Microsoft Learn, last updated 15 October 2026, says the same commercial audience.

Microsoft’s support article says Copilot does not provide legal advice or professional determinations, and is not a substitute for a qualified lawyer. Output can be wrong. The person who uses it reviews it.

When it rolls out

The blog says worldwide, on 15 October, and gives no end date. Message Center item MC1509799, read on the mc.merill.net mirror, is dated 15 October 2026, service Microsoft 365 apps, platforms Desktop, roadmap id 571884. The mirror says public preview began in late April 2026 and is expected to finish by mid-December 2026, and that general availability begins in mid-October 2026 and is expected to finish by mid-December 2026. Affected users, on the mirror, hold Microsoft 365 Copilot commercial licenses. LawSites, Bob Ambrogi, 15 October, reports the launch and the skill count. Its ranking of other companies’ legal products was not checked against those companies.

The mirror says the Legal Agent is being retired and that existing users lose access. The blog treats the plugins as the form those capabilities now take. Support still has a button labeled “Help me get started with the legal agent.” A Word feature for jumping between defined terms and their definitions is, the blog says, coming to preview later this month. It is not part of this general availability.

What turns on

Learn describes two plugins.

In Word desktop the legal plugin is on by default for commercial subscribers. Support says Copilot can then use legal skills, and that it tries to detect a legal document. A user turns it off in the Copilot sidebar: three dots, Manage plugins & skills, toggle Legal off. The mirror’s compliance table says its source does not state that users can disable the Word plugin themselves. Support does describe that toggle. For the tenant, Learn says use the Microsoft 365 Apps admin center, Policy Management, policy name “Legal Skills in M365 Copilot in Word.”

In Cowork the plugin is off until someone adds it. Support: Customize, Roles & Industry, “Legal for Cowork,” then invoke a skill with / or the plus menu. Learn names the admin control “Legal for Cowork” on Agent Tools in the Microsoft 365 admin center. The mirror says “the Cowork for Legal plugin” in that admin center. The names are close and not the same. Leaving the defaults means Word on, Cowork off until a user adds it.

Support’s Word workflows are: summarize, with numbered citations into the document; redlines as tracked changes a person accepts or dismisses; a playbook review that needs a .docx playbook and will not yet review from a template; and a draft skill, @Draft-new-contract, that turns an attached precedent into placeholders. The blog says drafting can use approved precedents in SharePoint. Support says upload from the computer or add from Microsoft 365. Obligation tracking and case chronologies are in the blog’s Cowork description, not in the support article. The blog says Word applies an edit only after the user approves it, and that prompts and documents are not used to train the foundation models. Those are Microsoft’s statements.

Partners, and the Frontier numbers

The blog says partner plugins are starting to roll out in the Microsoft plugin registry, with more later. Legal research: Bloomberg Law, Trellis, Descrybe Legal Engine, Legal Data Hunter, Courtroom5, Lawstronaut. Documents and matters: iManage Work, NetDocuments, Box, Litera, HighQ from Thomson Reuters, LegalZoom, Solve Intelligence. Signature: Docusign, Juro, Adobe Acrobat Sign, LawVu, SignatureAPI, Dropbox Sign, PandaDoc. Specialized legal AI: Harvey, Legora, DeepJudge. E-discovery: Everlaw, Relativity. The mirror does not name products. The names are the blog’s.

Since Frontier in April, Microsoft says, more than 1,800 users generated nearly 100,000 edits and kept roughly seven in ten. Internal checks, Microsoft says, were above 90 percent fluency, 95 percent conciseness, and 85 percent relevance. Aneesh Mehta, senior corporate counsel at Microsoft, says on the post that he already works in Word, and that Copilot’s first pass shows redlines in the document. He says a review that might take him an hour can often take several minutes. That timing is his, published by Microsoft.

Z.ai’s GLM-Legal is a different model, in the Harvey LAB account. Office files inside the Copilot app are a separate Frontier rollout, in the 12 October account.