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Microsoft 365

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Microsoft 365 is one of the most widely adopted productivity platforms for UK small and medium businesses, combining familiar Office applications with cloud-based collaboration, email, and security tools under a single subscription. Whether you are running a five-person trade business or managing IT for a 200-seat professional services firm, understanding what Microsoft 365 actually offers, how the plans compare, and how to get the most from your investment is essential before you commit your budget.

This guide covers everything UK business owners and IT managers need to know, including plan breakdowns, pricing, licensing, security features, migration considerations, and practical advice on getting started. If you are also weighing up broader cloud options, our detailed comparison of Microsoft 365, Azure, Google Workspace, and cloud migration is worth reading alongside this article.

What Is Microsoft 365?

Microsoft 365 (formerly Office 365) is a cloud-based subscription service from Microsoft that bundles together productivity applications, cloud storage, email hosting, communication tools, and security features. The core applications most businesses are familiar with include Word, Excel, PowerPoint, Outlook, and Teams, but the platform extends well beyond these into device management, advanced threat protection, and compliance tooling depending on which plan you choose.

For UK businesses, Microsoft 365 is typically purchased through Microsoft directly or via a UK-based Cloud Solution Provider (CSP). CSPs include large resellers like Softcat, Bytes, and CDW, as well as smaller managed service providers (MSPs) who may bundle Microsoft 365 with IT support. Purchasing through a CSP can offer better support, flexible billing terms, and the ability to mix and match licence types across your team.

The service runs across Windows, macOS, iOS, and Android, and most applications are available both as installed desktop software and as browser-based versions. For most UK SMBs, the cloud-hosted email (Exchange Online), team collaboration (Teams), and file sharing (SharePoint and OneDrive) are the primary reasons to choose Microsoft 365 over standalone software licences.

Microsoft 365 Plans for UK Businesses: What Are the Options?

Microsoft offers several tiers of Microsoft 365 for business users. The naming can be confusing, and it changes periodically, so the key is understanding what each tier includes rather than memorising product names. The main business plans relevant to UK SMBs are listed below. Prices shown are approximate monthly costs per user, based on annual commitment pricing in GBP, as of 2025, and are subject to change.

PlanApprox. Monthly Cost (per user)Key Inclusions
Microsoft 365 Business BasicFrom around £5Web and mobile Office apps, Teams, Exchange Online, 1TB OneDrive, SharePoint
Microsoft 365 Business StandardFrom around £10Everything in Basic plus desktop Office apps (Word, Excel, PowerPoint etc), webinar hosting
Microsoft 365 Business PremiumFrom around £18Everything in Standard plus Intune device management, Azure AD P1, Defender for Business, advanced security
Microsoft 365 Apps for BusinessFrom around £8Desktop Office apps and 1TB OneDrive but no Exchange email hosting

For most UK SMBs with up to 300 users, the Business plans above are the appropriate tier. If your organisation exceeds 300 users or requires more advanced compliance, governance, or enterprise security features, you would need to look at Microsoft 365 Enterprise plans (E3 and E5), which are priced significantly higher but include capabilities such as eDiscovery, advanced audit logging, and Microsoft Defender for Endpoint.

A common choice for growing UK businesses is Microsoft 365 Business Premium, which adds meaningful security tooling on top of the productivity suite. Given the increasing threat of phishing, ransomware, and credential theft targeting SMBs, the inclusion of Microsoft Defender for Business and Intune device management at that price point makes it genuinely competitive compared to buying equivalent security tools separately.

Core Features UK Businesses Use Most

While Microsoft 365 includes dozens of tools, the majority of UK SMBs rely heavily on a core subset. Understanding these well helps you extract real value from your subscription rather than paying for features that go untouched.

Microsoft Teams has become the central hub for internal communication in most Microsoft 365 deployments. It combines chat, video conferencing, file sharing, and third-party app integration in a single interface. For hybrid and remote teams in particular, Teams replaces the need for separate tools like Zoom or Slack, and it integrates tightly with Outlook calendars, SharePoint document libraries, and OneDrive. Many UK businesses also use Teams to run client calls, making it a customer-facing tool as well as an internal one.

Exchange Online provides hosted business email with custom domain support. For any UK business still running on-premises Exchange or a third-party mail host, migrating to Exchange Online via Microsoft 365 typically simplifies IT administration and improves reliability. Shared mailboxes, distribution groups, and calendar sharing are all handled within the same environment, reducing complexity. Email security is also centralised, with spam filtering, malware scanning, and anti-phishing policies manageable from the Microsoft 365 admin centre.

  • OneDrive for Business gives each user 1TB of cloud storage, accessible from any device
  • SharePoint Online acts as the team intranet and document management layer, particularly useful for shared file libraries and project folders
  • Microsoft Forms lets you build surveys, quizzes, and data collection forms quickly
  • Power Automate enables workflow automation without coding, such as automatically routing approval requests or syncing data between systems
  • Microsoft Planner provides basic task and project management, suitable for smaller teams who do not need a dedicated project management tool

Security and Compliance: What Microsoft 365 Includes for UK Businesses

Security is one of the strongest arguments for moving to Microsoft 365, particularly at the Business Premium tier. UK businesses face a well-documented and growing threat from phishing attacks, business email compromise, and ransomware. Microsoft’s built-in security tooling, when properly configured, addresses many of these risks without requiring separate purchases from a third-party security vendor.

Multi-factor authentication (MFA) is available across all Microsoft 365 plans and should be enabled for every user as a baseline. Enabling MFA through Microsoft Authenticator or a hardware security key such as a Yubico Security Key significantly reduces the risk of account compromise from stolen passwords. Microsoft’s own data consistently shows that MFA blocks the overwhelming majority of automated credential-stuffing attacks. For a deeper look at MFA strategy, our guide on Multi Factor Authentication for businesses is a useful companion read.

Microsoft 365 Business Premium specifically includes Microsoft Defender for Business, which provides endpoint detection and response (EDR) capabilities for up to 300 devices. It also includes Microsoft Intune for mobile device management (MDM), allowing IT administrators to enforce policies such as requiring device encryption, screen lock PINs, and conditional access rules that only allow compliant devices to access company data. For UK businesses subject to GDPR obligations, these controls can form part of your technical and organisational measures (TOMs) documentation.

  • Azure AD (Entra ID) P1 is included in Business Premium, enabling conditional access policies and self-service password reset
  • Microsoft Defender for Office 365 Plan 1 adds safe links and safe attachments, scanning email attachments and URLs before they reach users
  • Data Loss Prevention (DLP) policies can be configured to prevent sensitive information such as card numbers or NHS numbers from being shared outside the organisation
  • Microsoft Purview provides compliance and information governance tools, including retention labels and sensitivity labels for classifying documents

Migrating to Microsoft 365: What UK Businesses Need to Plan For

Moving from an existing setup to Microsoft 365 involves more than simply purchasing licences. A successful migration requires planning around email cutover, data migration, user training, and DNS changes. Rushing this process is one of the most common sources of business disruption during IT transitions, so it is worth taking the time to structure the project properly before you begin.

The most common migration scenarios for UK SMBs are cutover migrations (moving all mailboxes at once, suitable for organisations with under 150 mailboxes), staged migrations (moving batches of users over time from on-premises Exchange), and IMAP migrations (for businesses moving from non-Microsoft mail platforms such as Gmail or cPanel hosting). For businesses on Google Workspace, Microsoft provides the Mover tool to assist with content migration from Google Drive to OneDrive and SharePoint.

Before any migration, it is important to audit what you currently have. Identify all shared mailboxes, distribution lists, resource calendars, and third-party connectors that your current mail platform supports. Many businesses discover during this phase that they have legacy integrations, such as accounting software sending automated emails or CRM systems relying on specific SMTP settings, that need to be reconfigured before the cutover takes place. Planning for these early saves significant downtime later.

  • Allow a minimum of two to four weeks for planning and testing before the live cutover date
  • Set your DNS TTL (Time to Live) values low several days before migration to allow faster propagation when you change MX records
  • Run parallel email delivery for a period where practical, so no messages are lost during the transition window
  • Brief end users before go-live so they know what to expect, including potential re-authentication prompts on mobile devices
  • After migration, configure your SPF, DKIM, and DMARC records correctly to protect your domain from email spoofing

Licensing, Administration, and Cost Management

Managing Microsoft 365 licences efficiently can make a noticeable difference to your annual spend, particularly as your business grows or contracts. Licences are assigned per user, and you pay for every assigned licence whether or not that user actively uses the service. Conducting a regular licence audit, at minimum quarterly, helps identify users who have left the business, accounts that have been disabled but not deleted, and users who are over-licensed for their actual usage.

Microsoft’s admin centre provides usage reports under the Reports section, showing you per-application activity across Teams, Exchange, OneDrive, SharePoint, and more. If your analysis shows that a significant portion of users are only using email and Teams and never touch the desktop Office applications, those users could potentially be moved down to a Business Basic licence at a lower cost per seat. Conversely, if security is a priority, moving eligible users up to Business Premium provides substantially more protection for a comparatively modest additional cost per month.

UK businesses purchasing Microsoft 365 through a CSP typically benefit from monthly billing flexibility and access to a dedicated support channel through their reseller. Direct Microsoft purchases via the Microsoft 365 admin centre are available on annual commitments with monthly or upfront payment. Note that Microsoft adjusts UK pricing periodically, and VAT at 20% will be added to all purchases by UK businesses. It is worth confirming current pricing directly with Microsoft or your CSP before budgeting for a rollout or renewal.

Microsoft 365 vs Google Workspace: Which Should UK SMBs Choose?

The comparison between Microsoft 365 and Google Workspace comes up frequently for UK businesses evaluating cloud productivity platforms. Both are mature, capable services, but they suit different working patterns and business contexts. Microsoft 365 has a significant advantage in businesses where staff are familiar with the traditional Office desktop applications, where compatibility with clients using Word and Excel is important, or where the business needs to integrate with Microsoft-centric infrastructure such as Active Directory or Azure services.

Google Workspace tends to appeal more to businesses that prefer a browser-first, lightweight approach, organisations heavily invested in Google’s advertising or analytics ecosystem, or teams that prioritise real-time collaborative document editing as their primary workflow. Google’s pricing is often slightly lower at the entry tier, but Microsoft 365 Business Premium’s security bundle makes it more compelling on a total cost basis for businesses that would otherwise need separate endpoint security and MDM tools.

For a full head-to-head comparison including Azure, cost breakdowns, and migration considerations, our dedicated article on Microsoft 365, Azure, Google Workspace, and cloud migration covers this topic in considerably more depth and is recommended reading before making a final platform decision.

Key Takeaways

  • Microsoft 365 is a cloud subscription that bundles Office applications, email, Teams, cloud storage, and security tools into a single per-user, per-month licence
  • UK SMBs should evaluate Business Basic, Business Standard, and Business Premium tiers based on their application needs and security requirements
  • Business Premium is the strongest value proposition for businesses that need endpoint security and device management alongside productivity tools
  • Enable multi-factor authentication for all users immediately, ideally pairing it with a hardware key or authenticator app
  • Migration planning requires at minimum two to four weeks of preparation including DNS, user communication, and third-party integration audits
  • Regular licence audits help control costs, as unused or over-assigned licences represent avoidable ongoing expenditure
  • Microsoft 365 is generally the better fit for UK businesses with existing Microsoft ecosystems, Office-dependent workflows, or higher security and compliance requirements
  • Purchasing through a UK CSP can provide better support, billing flexibility, and expert guidance compared to buying direct

Frequently Asked Questions

How many users can be on a Microsoft 365 Business plan?

Microsoft 365 Business plans (Basic, Standard, Premium, and Apps for Business) support a maximum of 300 licensed users. If your business exceeds or expects to exceed 300 users, you will need to transition to a Microsoft 365 Enterprise plan such as E3 or E5. Enterprise plans have no user cap and include additional compliance, security, and governance features suited to larger organisations, but they are priced significantly higher per user per month.

Can I use Microsoft 365 on a Mac as well as Windows?

Yes. Microsoft 365 Business Standard and Premium include fully featured desktop applications for both Windows and macOS. Each licence allows installation on up to five PCs or Macs per user, plus up to five tablets and five smartphones. The macOS versions of Word, Excel, PowerPoint, Outlook, and Teams are functionally similar to their Windows counterparts, though some very advanced features may differ slightly. The browser-based versions of all applications work across any operating system including Linux and Chrome OS.

Does Microsoft 365 include backup for my data?

This is an important distinction that many UK businesses overlook. Microsoft 365 provides high availability and some version history for files stored in OneDrive and SharePoint, and it retains deleted emails for a configurable period, but it does not provide a comprehensive backup solution in the traditional sense. Microsoft operates under a shared responsibility model, meaning you are responsible for protecting your own data against accidental deletion, malicious deletion, or ransomware. Many UK businesses use third-party backup solutions such as Veeam Backup for Microsoft 365, Acronis, or Dropsuite to maintain independent, recoverable backups of Exchange, SharePoint, and OneDrive data.

Is Microsoft 365 GDPR compliant for UK businesses?

Microsoft 365 is built with data protection in mind and Microsoft publishes a Data Processing Agreement (DPA) that covers GDPR and UK GDPR obligations. You can choose to store your data in UK or EU data centres, and Microsoft provides tools within the platform to support compliance activities such as subject access requests, data retention policies, and audit logs. However, using a GDPR-compliant platform does not automatically make your organisation GDPR compliant. You still need to configure the platform appropriately, train your staff, and maintain your own records of processing activities. The tools are there to help, but using them correctly is your responsibility.

What happens to my data if I cancel my Microsoft 365 subscription?

When a Microsoft 365 subscription is cancelled or expires, access to the services is immediately restricted, though data is typically retained for a grace period before permanent deletion. Microsoft generally retains data for 90 days after cancellation, during which administrators can export or download content. After this period, data is deleted from Microsoft’s systems. It is strongly recommended that UK businesses export all email data, download OneDrive and SharePoint files, and save any Teams chat history they need before cancelling. Using a third-party backup solution provides an additional safety net and ensures you retain a copy of your data independent of Microsoft’s retention timelines.

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Author
Stuart Stafford

S Stafford is a UK-based IT consultant and technology writer with over 30 years of hands-on experience in the industry, dating back to 1993. He specialises in cybersecurity, networking, server infrastructure, and AI tools for small and medium businesses, and writes practical guides aimed at helping UK business owners understand and implement technology confidently.

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