Microsoft announced Microsoft 365 Copilot in March 2023. The product integrates GPT-4 with Microsoft Graph, the data layer that connects emails, calendar, documents, chats, and meetings. The enterprise implications are substantial.
What Microsoft Graph enables
Microsoft Graph is the API that connects the Microsoft 365 data layer: your emails, calendar events, Teams messages, SharePoint documents, and OneDrive files. Microsoft 365 Copilot uses Graph to give GPT-4 access to your actual organisational context. When you ask Copilot to draft an email based on a meeting, it can read your meeting transcript, your previous emails on that topic, and the related documents. The personalisation is not from training on your data but from runtime access to it.
The privacy and data governance model
Microsoft 365 Copilot inherits your organisation's Microsoft 365 permissions and compliance settings. Copilot does not grant users access to data they cannot already access. If a document is restricted to a specific group, Copilot will not surface it to users outside that group even if it would be relevant. The data processing happens in Azure, under Microsoft's existing enterprise compliance commitments including GDPR, ISO 27001, and SOC 2.
The $30 per user pricing
Microsoft 365 Copilot is priced at $30 per user per month as an add-on to existing Microsoft 365 enterprise licences. For a 1,000-person organisation, that is $360,000 per year. The ROI calculation requires an honest assessment of how many knowledge workers will use it actively, and for which workflows it genuinely saves time versus being a novelty. Early enterprise reports suggest that writing-heavy roles (marketing, legal, communications) see the clearest productivity gains.
The CIO decision
The Microsoft 365 Copilot buying decision sits at the intersection of IT, finance, HR, and legal in most large organisations. IT evaluates the security and compliance model. Finance evaluates the ROI. HR evaluates the workforce impact. Legal evaluates data residency and liability. This cross-functional decision-making is slower than a developer buying a SaaS tool. The enterprise AI adoption cycle in 2023 was slower than the press coverage suggested because this process takes time.