Managed Microsoft 365 Service for UK SMEs

Most SMEs buy Microsoft 365 and never touch the security settings again. That gap is where breaches happen. AMVIA closes it by treating your tenant as part of your wider Microsoft 365 security posture — not a licence line on an invoice. We configure, monitor and improve your environment continuously, so your in-house team can focus on the business instead of policy admin.

What's included in AMVIA's managed M365 service?

Our managed M365 service covers the full lifecycle of your tenant: licence procurement and right-sizing, security configuration, identity and access control, backup, and ongoing support. You get a single team accountable for keeping Microsoft 365 working and secure.

• Licence management — procurement, right-sizing and quarterly reviews so you only pay for what people use.
• Security hardening — MFA enforcement, conditional access, legacy authentication disabled, and anti-phishing rules. We deploy Microsoft Defender for Business for endpoint protection.
• Identity and access — joiner/mover/leaver processes, role-based access, and multi-factor authentication setup across every account.
• Backup and recovery — third-party backup of Exchange, SharePoint, OneDrive and Teams, because Microsoft's shared-responsibility model does not cover your data retention.
• Monitoring and support — 24/7 monitoring with critical issues responded to within one hour, plus a named account team.

How does AMVIA manage your Microsoft 365 tenant?

We work in four stages: review, optimise, manage and report. The first step is always a full audit of your existing configuration against Microsoft and NCSC best practice, so every later change is evidence-led rather than guesswork.

1. Tenant review — we run a Microsoft 365 security audit of your licensing, identity, sharing and security settings, scored against Microsoft Secure Score. 2. Optimisation — licences are right-sized, security baselines applied, and device policies set through Microsoft Intune device management. 3. Proactive management — we handle provisioning, licence changes, security alerts and configuration updates on your behalf. 4. Reporting — monthly reports on security posture, incidents handled and recommended improvements, reviewed with your account team.

Why do UK SMEs need a managed M365 service?

Because the default Microsoft 365 setup is not secure, and attackers know it. In 2025, 43% of UK businesses reported a cyber breach or attack, according to the Government's Cyber Security Breaches Survey 2025. The most common entry point was phishing — overwhelmingly aimed at email and identity, which both live inside Microsoft 365.

A misconfigured tenant carries real cost. The average disruptive breach costs a UK business around £3,550, and roughly 19,000 UK businesses were hit by ransomware in the past year. Identity-based attacks succeed when MFA is missing, legacy protocols stay open, or admin accounts are over-privileged — all of which a managed service fixes and keeps fixed. The National Cyber Security Centre lists exactly these controls as foundational. Managed M365 is how you maintain them without a full-time M365 specialist on payroll.

In-house vs managed Microsoft 365: which is right?

For most SMEs with 10–500 staff, a managed service delivers specialist security coverage that an internal generalist cannot match week to week. Microsoft changes M365 constantly; keeping pace is a job, not a task. The table below shows where the responsibility sits.

For deeper security operations beyond the tenant, AMVIA also delivers managed cybersecurity — endpoint detection, monitoring and incident response — under the same roof.

How much does a managed M365 service cost?

Cost has two parts: the Microsoft licences themselves, and AMVIA's management fee on top. We price management as a fixed monthly fee per user with no hidden extras, and we right-size licences so you are not overpaying. Microsoft's UK list prices (ex VAT, annual commitment) are below.

Prices per Microsoft 365 UK pricing. For most security-conscious SMEs, Business Premium is the right baseline because it bundles Defender and Intune — see our Business Premium vs Standard breakdown. Our licence right-sizing typically saves clients 10–20% on annual M365 spend, based on our 2026 client reviews, which often offsets much of the management fee.

Why choose AMVIA for managed Microsoft 365?

AMVIA is a security partner first and a Microsoft partner second — that order matters. We hold Cyber Essentials Plus certification and Microsoft Solutions Partner status (Modern Work, Security and Infrastructure), and our engineering team operates from Sheffield with deep knowledge of UK compliance.

• Security-first by default — every tenant is hardened, not just provisioned.
• One accountable provider — licensing, security, backup and support from a single team.
• Proven scale — we manage IT and security for 1,200+ UK businesses across legal, finance, healthcare and professional services, with a 4.8/5 customer rating.
• Microsoft-certified engineers — real specialists, UK-based, not an offshore queue.
• Fast response — critical issues answered within one hour by phone, email or portal.

Microsoft 365 now exceeds 400 million paid commercial seats globally, yet most SMEs lack the in-house expertise to keep their tenant secure. AMVIA supplies that expertise as a service.