◆ Microsoft Partner | M365 Managed Services UK

Microsoft 365 Managed Services for UK Businesses

Get more from your Microsoft investment with expert management, migration and support from a certified Microsoft partner. Stop paying for licences you are not using and start getting real security value from the tools you already have.

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300M+
Microsoft 365 Users Globally
<30%
Of M365 Features Most SMEs Actually Use
Microsoft
Certified Partner

Microsoft 365 is the productivity platform of choice for UK businesses of every size — but the gap between what organisations pay for and what they actually use is striking. Research consistently shows that most small and medium-sized businesses are using fewer than a third of the features included in their Microsoft 365 subscription. Unused licences assigned to former employees, ungoverned Teams environments clogged with redundant channels and guest accounts, email security left on default settings, and Conditional Access policies never configured — these are not edge cases. They are the norm. The result is money wasted on licences that could be right-sized, and significant security exposure left unaddressed in a platform that, properly configured, is one of the strongest security environments available to UK businesses.

Vertex9, as a certified Microsoft partner, manages the full Microsoft 365 stack for UK businesses — from initial migration and licensing through to day-to-day administration, security hardening and user support. We do not simply keep the lights on. We proactively improve your M365 environment, raise your Microsoft Secure Score, eliminate wasted licence spend and ensure your organisation is extracting genuine value from the subscription you are already paying for. Whether you need to migrate to M365 for the first time, take over management of an existing environment, or address specific challenges around Teams governance or email security, Vertex9 has the expertise to deliver.

Our Microsoft 365 Services

Full-stack M365 management — from migration and licensing optimisation through to security hardening and 24/7 end-user support.

M365 Migration

Zero-data-loss migration to Microsoft 365 from Google Workspace, on-premise Exchange, legacy mail providers or any other platform. Vertex9 handles the full migration lifecycle — pre-migration audit, data extraction, mailbox migration, SharePoint and OneDrive data transfer, calendar and contacts, and DNS cut-over. We use professional migration tooling and run parallel environments to validate everything before the final switch-over, ensuring your business experiences no disruption and loses no data.

Plan your migration →

Licensing Optimisation

Microsoft 365 licensing costs accumulate quickly and unchecked licence sprawl is one of the most common sources of avoidable IT spend. Vertex9 audits your current licence assignment against actual usage data, identifies orphaned licences assigned to former employees, and recommends right-sizing — moving users to the licence tier appropriate for their actual usage patterns. Most clients save 15–25% on their monthly Microsoft 365 licensing costs following a Vertex9 licensing audit.

Audit my licences →

Microsoft Teams Management

Left ungoverned, Microsoft Teams environments grow chaotic — hundreds of duplicate teams, guest accounts that should have been removed months ago, sensitive files shared in the wrong channels. Vertex9 establishes and enforces Teams governance policies, manages guest access permissions, structures your Teams and channels architecture to reflect how your business actually works, and implements naming conventions and lifecycle policies. We also configure Teams Direct Routing for businesses that want to use Teams as their business phone system — see our VoIP and unified communications page for more information.

Govern your Teams →

Exchange Online & Email Security

Email remains the primary attack vector for phishing, business email compromise and malware delivery. Vertex9 configures Exchange Online to the highest security standards — DMARC, SPF and DKIM email authentication records to prevent spoofing, Microsoft Defender for Office 365 for advanced threat protection, anti-phishing policies, safe links and safe attachments. For regulated organisations, we configure email archiving and eDiscovery to support compliance requirements. Our cybersecurity services team and M365 team work in concert to ensure end-to-end email protection.

Secure my email →

SharePoint & OneDrive

SharePoint and OneDrive are powerful document management and collaboration platforms — but only when configured properly. Vertex9 designs and builds SharePoint intranet environments aligned to your organisational structure, configures document libraries with appropriate metadata and versioning, and establishes external sharing policies that enable collaboration without exposing sensitive data. We migrate file servers and legacy document management systems to SharePoint and OneDrive, and provide ongoing administration as part of our managed M365 service.

Design my SharePoint →

M365 Security Hardening

Default Microsoft 365 configurations leave significant security gaps. Vertex9 conducts a comprehensive M365 security assessment and implements a structured hardening programme targeting a Microsoft Secure Score of 70% or above. This covers MFA enforcement for all users, Conditional Access policies, Microsoft Defender for Business or Defender for M365 configuration, privileged identity management, data loss prevention policies and information protection labels. Delivered as part of our broader cybersecurity services offering.

Harden my M365 →

Microsoft 365 Security: What Most Businesses Miss

Microsoft 365 is one of the most capable security platforms available to UK SMEs — but only if it is properly configured. Most organisations are not getting anywhere near the protection they are paying for.

When a new Microsoft 365 tenant is created, the default security configuration is not designed to protect a business — it is designed to get users up and running quickly. Legacy authentication protocols remain enabled. Multi-factor authentication is not enforced. Conditional Access policies do not exist. External sharing in SharePoint is wide open. Audit logging may not be enabled. The Microsoft Secure Score — Microsoft's own measure of your M365 security posture — typically sits at 20–35% for a freshly provisioned tenant with no hardening applied.

Vertex9 addresses this systematically. Our M365 security hardening programme works through a structured prioritised list of controls, implementing the highest-impact measures first and targeting a Secure Score of 70% or above for every managed client. The programme is divided into four key areas:

Identity & Access Control

Multi-factor authentication is the single most impactful security control available in Microsoft 365. Enabling MFA for all users eliminates the vast majority of credential-based attacks. Vertex9 enforces MFA via Conditional Access policies rather than per-user MFA, which is a more robust and manageable approach. We implement risk-based Conditional Access policies that challenge users when sign-in risk is detected — unusual locations, unfamiliar devices, or leaked credentials detected by Microsoft's intelligence feeds. Privileged accounts are placed under stricter controls, with Privileged Identity Management (PIM) used to ensure admin access is just-in-time and fully audited.

Email Authentication: DMARC, SPF & DKIM

Email spoofing — where an attacker sends email that appears to come from your domain — is trivially easy without proper authentication records in DNS. DMARC (Domain-based Message Authentication, Reporting and Conformance), SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail) are the three DNS-based controls that together prevent your domain being spoofed. Many UK businesses have SPF records but lack a properly configured DMARC policy at enforcement, meaning spoofed emails still reach recipients. Vertex9 configures all three records correctly and monitors DMARC reporting to identify and remediate spoofing attempts.

Microsoft Defender Configuration

Microsoft 365 Business Premium and E3/E5 plans include Microsoft Defender capabilities that go far beyond basic antivirus. Defender for Office 365 provides Safe Attachments and Safe Links protection, detonating suspicious email attachments in a sandbox environment before delivery and scanning links in real-time. Defender for Business provides endpoint detection and response (EDR) capabilities for enrolled devices. These features are included in the licences most businesses are already paying for — but they require configuration to be effective. Vertex9 configures and monitors Defender across the full M365 stack.

Data Protection & Compliance

Microsoft Purview (formerly Microsoft Compliance Centre) provides tools for data loss prevention, information protection labelling, retention policies and eDiscovery. For businesses subject to GDPR, financial services regulation or other compliance frameworks, these tools are essential. Vertex9 configures sensitivity labels to classify and protect documents, DLP policies to prevent sensitive data leaving the organisation via email or sharing, and retention policies aligned to your regulatory obligations. This work integrates with our broader cybersecurity services to provide a complete compliance and security posture.

Microsoft 365 Plans: Which Is Right for Your Business?

With multiple licence tiers available, choosing the right Microsoft 365 plan is important — both for getting the features you need and for avoiding unnecessary expenditure.

Microsoft offers a range of Microsoft 365 business plans, and the right choice depends on your organisation's size, security requirements, compliance obligations and budget. Vertex9 advises clients on licence selection as part of the initial assessment — ensuring you pay for what you actually need rather than defaulting to the cheapest option (which often lacks critical security features) or over-specifying unnecessarily.

Microsoft 365 Business Basic

Web and mobile versions of the Office apps, Exchange Online, Teams, SharePoint and OneDrive. No desktop Office applications and limited security features. Suitable for organisations with very basic requirements, but typically insufficient for businesses with any compliance or security obligations.

Microsoft 365 Business Standard

Adds full desktop Office applications (Word, Excel, PowerPoint, Outlook) and additional features including Bookings and webinar functionality. Still lacks the advanced security controls included in Business Premium. A common choice for general office workers who need desktop apps but may leave security gaps.

Recommended for Most SMEs

Microsoft 365 Business Premium

The most complete option for small and medium-sized businesses, adding Microsoft Intune device management, Microsoft Defender for Business, Azure AD Premium P1 (enabling Conditional Access), Information Protection and Azure Virtual Desktop rights. Business Premium is the plan Vertex9 recommends for the vast majority of UK SMEs — it includes the security tools needed to properly protect the environment, and for most organisations the additional cost over Business Standard is more than justified by the security and compliance capabilities unlocked.

E3 & E5 (Enterprise Plans)

Microsoft 365 E3 provides full compliance tools, advanced eDiscovery and Azure AD Premium P1 at an enterprise scale. E5 adds Microsoft Defender for Identity, Defender for Cloud Apps, advanced compliance capabilities and Power BI Pro. E3 and E5 are typically appropriate for larger organisations, heavily regulated industries (financial services, legal, healthcare) or businesses with complex security requirements. Vertex9 assists with the evaluation and licensing of enterprise plans. For a detailed comparison of E3 and E5 security capabilities, see our blog post on Microsoft 365 E3 vs E5.

Our Microsoft 365 Onboarding Process

A structured four-stage approach ensures your Microsoft 365 environment is properly configured, secured and actively managed from day one.

01

Licensing Audit

The engagement begins with a comprehensive audit of your current Microsoft 365 tenant — or, for new M365 customers, an assessment of your existing IT environment. We review every assigned licence against actual usage data from the M365 admin portal, identifying orphaned licences, over-provisioned users and opportunities to right-size. We document your current configuration, identify security gaps against Microsoft's Secure Score recommendations, and assess your SharePoint, Teams and Exchange environments. The output of the audit is a detailed report covering findings, recommendations and a clear improvement roadmap. This forms the foundation for everything that follows and is shared with you before any change is made to your environment.

02

Migration Planning

For businesses migrating to Microsoft 365 from another platform, Vertex9 produces a detailed migration plan covering source environment inventory (mailboxes, data volumes, shared drives, calendar and contacts data), migration sequencing, user communication plans, and go-live scheduling. We select migration tooling appropriate for your source environment — Microsoft FastTrack for straightforward migrations, BitTitan MigrationWiz or similar professional tools for complex scenarios. For businesses already on M365, this stage covers the planned security hardening and configuration improvements identified during the audit, sequenced to minimise disruption and prioritised by security impact.

03

Secure Deployment

Migration and configuration are executed in accordance with the agreed plan. For migrations, Vertex9 performs the data transfer, validates completeness, configures DNS records and executes the cut-over with engineering support on hand throughout. For security hardening, we implement controls in priority order — starting with MFA and Conditional Access, then email authentication, then Defender configuration, then data protection and compliance policies. Each change is tested before implementation and we maintain a configuration change log throughout. We verify Microsoft Secure Score improvement at each phase milestone. User adoption training is delivered following deployment — covering Teams, Outlook, SharePoint and OneDrive for all staff, with role-specific sessions for IT administrators.

04

Ongoing Management

Following deployment, Vertex9 provides continuous managed support for your Microsoft 365 environment. Day-to-day administration — user provisioning and deprovisioning, licence assignment, password resets, mailbox management, Teams and SharePoint administration — is handled by our team under agreed service levels. We monitor your Microsoft Secure Score, Defender alerts and compliance posture proactively, addressing emerging risks before they become incidents. Licence assignments are reviewed quarterly to ensure you are never paying for licences that are not being used. Moves, additions and changes are processed promptly, and your M365 environment is kept up to date with Microsoft's evolving security recommendations. This service integrates fully with our managed IT support offering for businesses that want end-to-end managed IT.

Frequently Asked Questions About Microsoft 365

Answers to the questions UK businesses most commonly ask about Microsoft 365 managed services, migration and licensing.

Email migration to Exchange Online typically takes two to four weeks for most organisations, including pre-migration preparation, the data transfer itself, DNS cut-over and post-migration validation. SharePoint and Teams migration takes longer — the timeline depends on the volume of data, the complexity of existing permissions structures and the degree of organisational change management required. Organisations migrating large SharePoint environments or extensive file server data to SharePoint and OneDrive should plan for six to twelve weeks. Vertex9 provides a detailed project timeline at the start of every engagement, based on a proper assessment of your source environment, so you have a realistic picture of the timescales involved before committing to a go-live date.

Yes. Vertex9 migrates businesses from Google Workspace (formerly G Suite) to Microsoft 365, covering every element of the transition. Gmail mailboxes are migrated to Exchange Online, Google Calendar to Outlook Calendar, Google Contacts to Outlook Contacts, and Google Drive content to SharePoint and OneDrive — with folder structures and sharing permissions recreated appropriately in the Microsoft environment. We use professional migration tooling to ensure zero data loss and perform rigorous pre and post-migration validation. Users receive training on the Microsoft 365 tools before cut-over to minimise the learning curve. The migration is typically delivered in phases, starting with a pilot group of users to validate the process before the full organisation is migrated.

The licensing optimisation process begins with a detailed audit that maps every assigned Microsoft 365 licence against actual usage data drawn from the M365 admin portal and usage reports. We identify users with licences for products and features they have never activated, users who left the organisation months ago but whose accounts and licences remain active, and cases where users are assigned a higher-tier licence than their actual usage pattern requires. We also look for opportunities to consolidate add-on licences into the core plan. The audit findings are presented as a clear recommendation with projected savings. Most clients save between 15% and 25% on their monthly Microsoft 365 licensing costs. Implementation of the recommendations is handled by Vertex9, including deprovisioning inactive accounts and reassigning licences appropriately.

Microsoft Secure Score is a numerical measurement of your organisation's security posture within the Microsoft 365 and Azure environment, scored from 0 to 100%. It assesses your configuration across five categories — identity, data, devices, apps and infrastructure — and awards points for each security control that has been implemented. A higher score indicates that more of the recommended security controls are in place, reducing your attack surface. Microsoft publishes the full list of recommended actions with their point values and implementation guidance in the Security Centre, making it a transparent and actionable measure. Vertex9 uses Secure Score as a key metric across all managed M365 clients, targeting a score of 70% or above and reporting on progress monthly. A score below 40% — which is not uncommon for unmanaged tenants — indicates significant security gaps that should be addressed as a priority.

Yes. User adoption training is included as a standard part of the Microsoft 365 onboarding process for all Vertex9 managed clients. We deliver role-appropriate training sessions covering the tools each group of users will interact with day-to-day. General staff receive training on Teams (chat, meetings, channels and file sharing), Outlook and OneDrive. Power users and team administrators receive additional training on SharePoint site management, Teams governance and more advanced M365 features. IT administrators receive in-depth sessions covering the M365 admin portal, Exchange administration, SharePoint administration and security configuration. Training can be delivered remotely via Teams or on-site, and recordings are provided for future reference and onboarding of new staff.

Office 365 was the original brand name for Microsoft's cloud productivity suite when it launched, encompassing the familiar applications — Word, Excel, PowerPoint, Outlook, Teams and SharePoint — delivered as a subscription service. Microsoft 365 is the evolved and expanded offering that retains all of those productivity applications and adds a significantly broader set of capabilities, including device management via Microsoft Intune, advanced security tools through Microsoft Defender, Windows licensing (in certain plans), and a comprehensive suite of compliance and governance tools through Microsoft Purview. Microsoft retired the Office 365 brand for business plans in 2022 and all current business subscriptions are sold as Microsoft 365. Despite this, many people — and many IT providers — still use the terms interchangeably. If you are referencing any current Microsoft productivity subscription, it is Microsoft 365. For a full comparison of what is included in each Microsoft 365 plan, Vertex9 can provide a detailed breakdown as part of a free assessment.

Why Choose Vertex9 for Microsoft 365?

As a certified Microsoft partner, Vertex9 has the expertise and accreditations to deliver M365 projects to the highest standard.

Certified Microsoft Partner

Vertex9 holds Microsoft partner status, demonstrating verified expertise in Microsoft 365 deployment, management and security. Our team holds Microsoft certifications covering Teams, Azure, security and compliance — ensuring the engineers working on your environment have the knowledge to do it properly.

Security-First Approach

Every M365 engagement is delivered with security at the forefront. We do not treat security hardening as an optional extra — it is embedded into every migration, every onboarding and every ongoing management contract. Your Secure Score is tracked and reported monthly, and we proactively respond to new Microsoft security recommendations as they are published.

Integrated with Managed IT Support

Vertex9 M365 management integrates seamlessly with our broader managed IT support and cloud services offerings. If you are a fully managed Vertex9 client, your Microsoft 365 environment is managed as part of a holistic IT service, not in isolation. End-user support, device management, network support and M365 management all come from one team with a complete picture of your environment.

No Long-Term Lock-In

Vertex9 does not lock clients into long-term contracts with punitive exit clauses. We earn your continued business by delivering genuine value. Our managed M365 service is offered on rolling monthly contracts, with flexible onboarding periods for new migrations. We are confident that the quality of our service and the measurable improvements we make to your M365 environment will speak for themselves.

Get a Free M365 Assessment

Whether you need to migrate to Microsoft 365, right-size your licensing, improve your Secure Score, or simply get better value from the subscription you are already paying for — Vertex9 can help. Our free M365 assessment covers your current tenant configuration, licensing spend, security posture and a clear improvement roadmap, with no obligation to proceed.

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