Business Premium vs Microsoft 365 E3

Sources: Microsoft's Business Premium page, E3 page, Defender for Business overview, Endpoint Plan 1 description and Defender licensing guidance. These are selected buying considerations, not a complete feature or use-rights matrix.

Defender for Business includes capabilities beyond Endpoint Plan 1. Moving from Business Premium to E3 therefore needs a review of the endpoint and email protections you intend to keep. Do not treat the change as an automatic security improvement or assume all existing features will remain licensed.

Ask your technical team to list the controls currently deployed and the licences that permit them. Compare that list with the proposed bundle and any required add-ons. Buying a licence also does not configure the controls, monitor alerts or certify the organisation. If you need help with that work, request a separate support scope.

Microsoft's Business plan guidance states a 300-user maximum and directs organisations expecting to exceed that level to enterprise options. That is a prompt to plan, not a rule that every licence in a growing organisation must change on the same day. Have the exact proposed combination checked against current use rights and your procurement agreement.

Both UK product pages show variants with and without Teams. Microsoft also reopened enterprise suites with Teams to new customers from November 2025. Check the full offer name instead of relying on older advice that every new enterprise buyer must buy Teams separately. Teams Premium, telephone connectivity and paid Microsoft 365 Copilot capabilities are separate questions.

Suppose you have 220 Business Premium licences and expect another department to join. Build two scenarios: retaining the current plan where suitable, and an enterprise configuration that covers the required roles and growth. Keep quantities equal for the first price comparison. Show any extra security or specialist licences as separate lines.

Next, compare a realistic future headcount scenario. Label the change in quantity separately from the change in unit price. A more expensive overall basket can reflect more people or extra capabilities rather than a poor renewal offer. Equally, a lower headline E3 quote is not a saving if essential add-ons were omitted.

Our free saved licence inventory helps check available and assigned quantities. It does not establish active use, invoice prices, contractual reductions or security configuration. Your internal team remains the source for those decisions.

Use the renewal planner to work back from each confirmed renewal date. Then build your mixed licence quote, including the exact plan variants, quantities, current commitment and any features that must be retained. Licence-only supply is welcome; you do not need to replace your IT team or buy a managed service.

We offer annual commitment paid upfront or monthly commitment paid monthly, where available. We do not offer annual commitment paid monthly. Compare the annual cash requirement as well as the monthly equivalent. Our team confirms the products, price, VAT and supply arrangements by email before you accept.