What does Copilot Chat give you without the add-on?
Microsoft Copilot Chat is available to users with an eligible Microsoft 365 subscription and does not need a Microsoft Copilot licence. According to Microsoft's comparison, it includes web-grounded chat, enterprise data protection, file uploads and analysis, and image generation, plus organisational grounding in supported Outlook scenarios. For staff who mainly want to draft text, summarise a document they upload or research a topic, that may be enough. Check it first, because it costs nothing extra and shows you which staff use AI regularly before you pay for more.
What does the paid Microsoft Copilot licence add?
Microsoft's comparison lists the differences. The paid licence adds broad organisational reasoning across Microsoft 365 data, where Copilot Chat is limited; Microsoft Graph, Work IQ and semantic indexing, which Chat does not have; fuller agent experiences; and priority access. This is what lets Copilot answer a question using a user's emails, meetings, chats and documents together, such as summarising a client's recent correspondence and the last project meeting. The licence is an add-on to a qualifying plan. Microsoft Copilot Business is the add-on for organisations with up to 300 users on eligible Business plans, sold with an annual commitment.
Which staff are most likely to get value?
The paid features draw on email, meetings, chats and files, so value follows the people whose work happens there. Look for roles that spend hours finding information across many documents and threads, or turning meetings into actions. Roles that work mostly in other systems, such as field staff in a job management app or bookkeepers in accounting software, may get less from the add-on because their core data sits outside Microsoft 365. Use the list below as a starting point and check it against how each person actually spends their week.
- Account and project managers who track many client threads.
- Executive assistants and managers with heavy meeting loads.
- Staff who write proposals, tenders or reports from existing documents.
- Team leaders who need to catch up on chats and decisions after leave.
What has to be in place first?
Microsoft's requirements include a work account in Microsoft Entra ID for every user and an Exchange Online mailbox for experiences that use email, calendar or meeting data. Some features need a OneDrive account. For Copilot to reference meeting content after a Teams meeting ends, transcription or recording must be configured. Microsoft also recommends a secure and governed foundation before deployment. If your business still runs email on its own server or keeps most files on a local file server, the add-on will have little organisational data to work with until that changes.
Will Copilot show staff files they should not see?
Copilot only surfaces organisational data that a user already has at least view permission to access, so it does not change who can open a file. It changes how easily people find things. A folder shared with everyone years ago, or an HR site with broad access, becomes much easier to stumble on once anyone can ask a question across all the content they can reach. Microsoft advises using the Microsoft 365 permission models to make sure the right people have the right access. It also states that prompts, responses and data accessed through Microsoft Graph are not used to train its foundation models.
For sites that need a permissions review, Restricted Content Discovery can temporarily stop a SharePoint site's content appearing in organisation-wide search and Copilot responses without changing anyone's permissions. Microsoft describes it as a temporary control while access is reviewed, and it needs a Microsoft Copilot licence and the SharePoint Advanced Management prerequisites.
How do you test the value before licensing everyone?
Buy licences for a small group in the roles most likely to benefit, and measure before and after. Pick three or four tasks each person does every week, time them for a fortnight before the licence, then again after a few weeks of use with some basic training. Record where Copilot saved time and where staff had to correct it. Expand only to roles where the measured result justifies the licence cost, which you can check on Microsoft's current pricing page. Because Copilot Business is sold with an annual commitment, size the first purchase to the group you are testing.