In short: Microsoft 365 Business plans (Basic, Standard, Premium) are designed for organisations with fewer than 300 users and cover the vast majority of UK SME requirements. Microsoft 365 Enterprise plans (E3, E5, F3) are aimed at larger or more complex organisations needing advanced compliance, identity management, or frontline worker capabilities. For most Advantage clients, Business Premium is the right answer — it delivers enterprise-grade security at an SME price point. The step up to Enterprise is worth examining only when you exceed 300 users, need capabilities like advanced eDiscovery, or have specific regulatory obligations that Business Premium does not meet.
Plan comparison at a glance
Pricing excludes VAT and is indicative as of mid-2025. Business plans are capped at 300 users.
| Business Basic | Business Standard | Business Premium | Advantage view | |
|---|---|---|---|---|
| Price per user/month | £4.90 | £9.90 | £19.90 | Premium is the most cost-effective security uplift available to UK SMEs |
| Desktop Office apps | Web & mobile only | Yes — Word, Excel, PowerPoint, Outlook | Yes | If your teams use complex spreadsheets or documents, Standard or above is essential |
| Email & calendar | Exchange (50 GB mailbox) | Exchange (50 GB mailbox) | Exchange (50 GB mailbox) | All plans include full business email — no meaningful difference here |
| Teams & collaboration | Yes | Yes | Yes | Teams is included across all Business tiers |
| Cloud storage | 1 TB OneDrive per user | 1 TB OneDrive per user | 1 TB OneDrive per user | Consistent across all Business plans |
| SharePoint | Yes | Yes | Yes | All plans include SharePoint for intranet and document management |
| Webinars | — | Yes — Teams Webinars | Yes | Standard and above include webinar hosting with registration pages |
| Microsoft Defender for Business | — | — | Included | Endpoint protection for all devices — a key reason to choose Premium |
| Intune device management | — | — | Included | Essential for managing company devices and BYOD securely |
| Azure AD P1 (Entra ID P1) | — | — | Included | Enables conditional access, MFA policies, and identity protection |
| Information protection | — | — | Azure Information Protection P1 | Allows classification and protection of sensitive documents |
| User limit | 300 | 300 | 300 | All Business plans cap at 300 users — Enterprise needed above this |
Enterprise plans at a glance
Enterprise plans have no user cap and are purchased through a Microsoft volume licensing agreement or partner. Pricing varies by agreement and commitment term.
| Microsoft 365 F3 | Microsoft 365 E3 | Microsoft 365 E5 | Advantage view | |
|---|---|---|---|---|
| Primary audience | Frontline & shift workers | Knowledge workers, mid-market | Enterprise, regulated sectors | Most Advantage clients do not need Enterprise — Premium covers them |
| Desktop Office apps | Web & mobile only | Yes | Yes | E3 and E5 match Business Standard and Premium on desktop apps |
| Advanced compliance | — | Core compliance (DLP, retention) | Full suite — eDiscovery, audit, insider risk | E5 compliance tools are relevant for financial services and legal firms |
| Advanced security | — | Defender for Endpoint P1 | Defender for Endpoint P2 + Sentinel | E5 security is enterprise SIEM territory — overkill for most SMEs |
| Power BI Pro | — | — | Included | Saves separate Power BI Pro licences (£8.40/user/month) at scale |
| Audio conferencing | — | — | Included | Dial-in conferencing numbers included in E5; add-on cost in lower plans |
| User cap | None | None | None | The primary reason to move to Enterprise is exceeding 300 users |
Which plan fits your business?
Choose Business Premium if…
- You have fewer than 300 users
- You want enterprise-grade security without enterprise complexity
- You need device management for company or personal devices
- You operate in a regulated sector (financial services, healthcare, legal)
- You want Defender for Business protecting all endpoints
- Cyber Essentials Plus or ISO 27001 compliance is on your roadmap
Choose Business Standard if…
- You have fewer than 300 users
- Your teams need full desktop Office applications daily
- You want Teams Webinars for client or marketing events
- Security requirements are met by baseline Microsoft 365 controls
- You are not yet ready to invest in managed device enrolment
Consider Enterprise if…
- You have more than 300 users
- You need advanced eDiscovery or insider risk management
- You are a regulated firm with complex data residency requirements
- Power BI Pro at scale makes E5 more cost-effective than separate licences
- You need Defender for Endpoint P2 or Microsoft Sentinel
Microsoft 365 licensing — managed by Advantage
Choosing the wrong Microsoft 365 plan is a common and costly mistake for UK SMEs. Under-licensed businesses carry avoidable security risk; over-licensed ones pay for capabilities they never use. Advantage reviews your current or planned Microsoft 365 estate, matches licences to actual user needs, and manages your subscription on an ongoing basis — including mid-year licence changes and renewal negotiations.
The Advantage methodology
We approach Microsoft 365 licensing in three structured phases so your investment is optimised from day one.
We review your user count, security posture, device landscape, and business growth plans before recommending the right licence mix — Business, Enterprise, or a combination.
Licence provisioning, user onboarding, security configuration, and any required data migration — delivered to a clear timeline with minimal disruption to your business.
Ongoing licence management, security monitoring, renewal handling, and access to our UK-based helpdesk — so your Microsoft 365 estate stays optimised as your business changes.
Frequently Asked Questions — Microsoft 365 Business vs Enterprise
Common questions from UK businesses deciding between Microsoft 365 Business and Enterprise plans — answered honestly by Advantage, Microsoft Solutions Partner.
What is the difference between Microsoft 365 Business and Enterprise plans?
Microsoft 365 Business plans (Basic, Standard, Premium) are designed for organisations with up to 300 users. They cover the productivity, communication, and security needs of most UK SMEs, with Business Premium delivering enterprise-grade security tools at an accessible price.
Enterprise plans (F3, E3, E5) have no user cap and include more advanced compliance, identity, and security capabilities suited to larger or more complex organisations. The most common trigger for moving to Enterprise is exceeding 300 users or needing capabilities such as advanced eDiscovery, insider risk management, or Microsoft Sentinel.
Is Microsoft 365 Business Premium worth the extra cost over Business Standard?
For most UK SMEs, yes. The step from Business Standard (£9.90/user/month) to Business Premium (£19.90/user/month) adds Microsoft Defender for Business, Intune device management, Azure Active Directory P1, and Azure Information Protection P1. Purchasing these tools individually would cost significantly more than the £10 premium per user.
If your business handles sensitive client data, operates in a regulated sector, or wants to achieve Cyber Essentials Plus, Business Premium is the right foundation. If your primary concern is desktop applications and you have no device management requirement, Business Standard may be sufficient.
What happens when we grow beyond 300 users?
Microsoft 365 Business plans are capped at 300 users. If your organisation exceeds this threshold, you will need to move to an Enterprise plan. The closest equivalent to Business Premium at the Enterprise tier is Microsoft 365 E3 combined with an Enterprise Mobility and Security add-on, though E5 is the more direct comparison when advanced security is a priority.
Advantage can manage this transition for you — including renegotiating your Microsoft agreement, migrating licences, and ensuring no disruption to your users during the move.
Do I need Microsoft 365 E5 for advanced security?
Not usually, if you have fewer than 300 users. Microsoft 365 Business Premium provides Defender for Business, Intune, and Azure AD P1 — which covers the security requirements of the vast majority of UK SMEs. E5 adds Defender for Endpoint P2, Microsoft Sentinel (SIEM), and advanced compliance features like insider risk management and communication compliance. These are genuinely valuable for larger enterprises or heavily regulated firms, but represent capability most SMEs would not use.
If you are unsure whether Business Premium or an Enterprise security plan is right for your risk profile, Advantage can carry out a security assessment and give you an honest recommendation.
What is Microsoft 365 F3 and who is it for?
Microsoft 365 F3 is a frontline worker licence designed for employees who do not sit at a desk with a dedicated PC — such as care home staff, warehouse operatives, retail workers, or field engineers. It provides web and mobile access to Microsoft 365 apps, Teams, and SharePoint, but does not include full desktop Office applications.
F3 is often used alongside Business or Enterprise licences within the same organisation, giving knowledge workers full licences and frontline staff a lower-cost option that meets their actual needs.
Can I mix Business and Enterprise licences in the same organisation?
No — Microsoft 365 Business and Enterprise plans cannot be mixed within the same tenant. Once you need Enterprise capabilities or exceed 300 users, all licences within the organisation must move to Enterprise plans. You can, however, mix different Enterprise tiers (for example, some users on E3 and others on E5) or combine Enterprise plans with F3 frontline licences.
This is one reason it is worth planning your Microsoft 365 licensing strategy ahead of growth — rather than migrating under time pressure when you hit the 300-user ceiling.
How do I find out which Microsoft 365 plan is right for my business?
Advantage reviews your current technology setup, user requirements, security obligations, and growth plans before recommending the right Microsoft 365 licence mix. We manage the full lifecycle — from initial recommendation through to provisioning, configuration, and ongoing licence management.
You can contact us online, call us on 020 3004 4600, or email hello@advantage.co.uk to start the conversation.
