GILD verdict
Give Microsoft 365 users Copilot Chat and buy paid licenses by role.
Fix overshared SharePoint content before Copilot answers from work data. Judge paid licenses on measured use after a targeted pilot.
Microsoft Copilot
AI Assistant by Microsoft
−3 MixedFit and limits
Who it fits
- Your company runs on Microsoft 365, so Copilot can answer from the email, files, meetings, and chats each person can already open.
- You want the assistant under Microsoft 365's enterprise data terms: prompts, responses, and Graph data are not used to train foundation models, and Purview retention and audit apply to Copilot interactions.
- Teams meetings and long email threads take much of your people's week; meeting recaps and summaries are where users and evaluations report the clearest gains.
- You need a governed way to build agents on company content, with admin approval before an agent reaches users.
Where it falls short
- Copilot Chat alone grounds mainly on the web and files people hand it, plus each person's own mailbox, calendar, meetings, and chats inside Outlook; answers across SharePoint and the wider Microsoft 365 graph need the paid license.
- Copilot reaches anything a user can open, so years of loose SharePoint sharing turn into answers; Microsoft supplies SharePoint Advanced Management with the license for this.
- Users report weak results in Excel and PowerPoint and inconsistent actions such as calendar changes, and every evaluation found outputs that needed checking.
- Agents for Copilot Chat users and Cowork bill on usage, so metered usage adds to the license price.
Implementation reality
Start with Copilot Chat for everyone
Copilot Chat comes with eligible Microsoft 365 subscriptions for Entra users under enterprise data protection. It answers from the web and uploaded files, plus supported app context. In Outlook, that includes the inbox, calendar, and meetings. Enable and pin it before deciding who needs a paid license.
Find oversharing before licenses go out
A paid license grounds Copilot in Microsoft Graph and Work IQ across everything a user can open. SharePoint Advanced Management comes with that license. Use its data access governance and sharing-link reports to find oversharing. Apply restricted content discovery to high-risk sites while owners fix access.
Pilot by role, with champions
Select roles with heavy meeting and email loads or frequent document work. Name the tasks for the pilot. Recruit champions to show colleagues what works.
Decide the model and region settings
Anthropic models are on by default for most commercial tenants outside the EU, EFTA, and UK and are excluded from the EU Data Boundary. Microsoft Copilot itself is an EU Data Boundary service for EU customers. Decide the subprocessor setting with privacy and legal before licenses go out.
Measure, then reassign
Copilot Analytics reports readiness and adoption, plus impact. After 90 days, move licenses from light users to roles that use them. Measure output as well as time. The Department for Business and Trade's observed task sessions matched what users reported for summaries and emails and contradicted it for Excel and PowerPoint, and its evaluators could not link the time saved to higher productivity.
What to verify before you buy
Billing
- Unit of consumption: Copilot Credits are the unit for Copilot Chat and SharePoint agents.
What to measure in your pilot
- The 13 evaluations GILD read report mostly self-reported minutes; in your pilot, pick one output per role, such as cases closed, and compare licensed users with a matched unlicensed group.
- GILD found no per-task credit rates for Cowork in Microsoft's documentation; have pilot users type /cost after each task for four weeks, then set monthly credit limits from those logs.
Sources
- Official documentation
- 18
- Public source
- 2
- Microsoft: Microsoft Copilot for enterprise, plans and pricing
- Microsoft: Microsoft Copilot for business, plans and pricing
- Microsoft: Microsoft 365 E7
- Microsoft Learn: License options for Microsoft Copilot
- Microsoft Learn: What is Microsoft Copilot?
- Microsoft Learn: Overview of Microsoft Copilot Chat
- Microsoft Learn: Data, privacy, and security for Microsoft Copilot
- Microsoft Learn: Enterprise data protection in Microsoft Copilot and Microsoft Copilot Chat
- Microsoft Learn: Anthropic models in Microsoft Online Services
- Microsoft Learn: SharePoint Advanced Management overview
- Microsoft Learn: Prepare for Microsoft Copilot by comparing E3, E5, and E7 license features
- Microsoft Learn: Copilot controls overview
- Microsoft Learn: Manage agents in the Microsoft 365 admin center
- Microsoft Learn: Microsoft Copilot pay-as-you-go service overview
- Microsoft Learn: Copilot Studio billing rates and management
- Microsoft Learn: Copilot Cowork FAQ
- GOV.UK: Microsoft 365 Copilot pilot, DBT evaluation report (Aug 28, 2025)
- GOV.UK: Department for Business and Trade, Microsoft 365 Copilot evaluation report (PDF, Aug 28, 2025)
- Microsoft Learn: Check your credit usage for Cowork tasks with /cost
- Microsoft Learn: Use Copilot Studio capacity packs for Microsoft Copilot Chat and SharePoint agents