Managed Microsoft 365 Partner
Managed Microsoft 365 Services for Modern Businesses
ATS Connection helps businesses secure, manage and optimise Microsoft 365 with proactive support, security hardening, user management and strategic guidance from experienced UK-based engineers. Licences are billed at cost, and management sits within our fixed monthly IT support pricing, from £30 per user.
Not ready for a call? Start with the twelve-minute self-serve security check.
Microsoft 365 tenanthardened & Monitored
Avg response time15 Minutes
100+
M365 tenants managed
Since 2015
Supporting UK businesses
15 min
Average response time
98%
First-contact resolution
What ats manages
A proactive Microsoft 365 partner for
growing businesses
We take ownership of your Microsoft 365 environment end-to-end, identity, devices, data, productivity and security so your team has one accountable partner.
Exchange Online
Mailboxes, distribution groups, shared mailboxes, anti-phishing and modern email security.
Microsoft Teams
Teams, channels, meetings, voice, governance and external access policies.
SharePoint & OneDrive
Sites, libraries, permissions, sharing controls and structured information architecture.
Intune device management
Enrolment, compliance, application deployment, updates and remote wipe across all platforms.
Entra ID / Azure AD
Identity, groups, Conditional Access, role-based access and privileged identity management.
User onboarding & offboarding
Standardised joiner / mover / leaver processes with full Microsoft 365 lifecycle management.
Licensing management
Right-sizing, optimisation and clear advice on Business Premium, E3, E5 and add-on SKUs.
Tenant governance
Configuration baselines, change control, audit and documented standards across the tenant.
Backup & recovery
Independent immutable backup of Exchange, SharePoint, OneDrive and Teams, with tested restore.
Security configuration
MFA, Conditional Access, Defender for Office 365 and Defender for Endpoint baselines.
Adoption & training
Practical guidance to help your team get real value from Microsoft 365, not just licences.
Migrations & projects
Tenant-to-tenant moves, M365 onboarding, hybrid Exchange and consolidation projects.
why businesses choose ats
A strategic Microsoft 365 partner not a licensing reseller
Hardened tenants, governed users, secure devices and grown-up
advice delivered by senior UK engineers who actually
answer the phone.
Microsoft 365 specialists
Deep, hands-on experience across Exchange Online, SharePoint, Teams, Intune and Entra ID, not a sideline service.
Security-first by default
Every tenant we manage is hardened against modern threats, identity, email, sharing, devices and backup, by default.
Proactive management
We tune, govern and improve your tenant continuously, not just respond when something breaks.
UK-based engineers
All engineering in-house, in the UK. Named engineers and account managers who genuinely know your environment.
Strategic guidance
Quarterly reviews and a clear roadmap aligned to your business, growth plans and licensing.
Responsive support
15-minute average response time for Microsoft 365 support requests, escalations and incidents.
Operational maturity
Documented standards, change control, governance and Cyber Essentials alignment as standard.
Long-term partnership
The majority of our clients have been with ATS for 5+ years. a relationship, not a renewal.
Common microsoft 365 problems
The Microsoft 365 issues we see
most often and quietly fix
Microsoft 365 is the operating system of most modern businesses, but few tenants
are configured, secured or governed the way they should be. ATS becomes the proactive partner
who finally takes ownership.
Poor tenant security
Default Microsoft 365 settings leave gaps in identity, sharing and external access, attackers know exactly where to look.
MFA & identity gaps
Inconsistent MFA, exempted accounts and weak Conditional Access remain the most common cause of M365 account takeover.
SharePoint & OneDrive sprawl
Unstructured sites, broken permissions and over-shared files quietly create compliance and security risk over time.
Unmanaged devices
Personal laptops and unmanaged phones connecting to M365 with no Intune policies or compliance checks.
Onboarding & offboarding
Leavers retaining access, licences not reclaimed and inconsistent setup of new starters across Teams, SharePoint and email.
Weak backup protection
Most businesses assume Microsoft backs up their data, it doesn’t, beyond limited retention windows.
Licensing complexity
Mixed plans, unused licences and confusion over what each SKU actually includes quietly wasting budget.
Teams & email issues
Phishing, missed messages, broken integrations and unclear governance across Teams, channels and shared mailboxes.
microsft 365 secuirty
Enterprise-grade Microsoft 365
security, properly managed
We harden, monitor and govern your Microsoft 365 environment to a consistent, security-first
standard, closing the gaps default tenants leave open.
MFA & Conditional Access
Enforced across every account and aligned to risk with location, device and sign-in conditions tuned to your business.
Identity protection
Entra ID monitoring, risky sign-in detection and privileged access controls to protect directors and admin accounts.
Phishing & email defence
Defender for Office 365 hardening, anti-impersonation policies and safe attachments / safe links across Exchange.
Intune device management
Managed enrolment, compliance policies, encryption and remote wipe across Windows, Mac, iOS and Android.
Secure remote working
Conditional Access, device compliance and modern authentication for hybrid teams without slowing people down.
Independent backup
Third-party, immutable backup of Exchange, SharePoint, OneDrive and Teams well beyond Microsoft’s native retention.
Tenant monitoring
Continuous monitoring of configuration drift, audit logs and security posture with named UK engineers on call.
Compliance & governance
DLP, retention, sensitivity labelling and documented controls aligned to Cyber Essentials and client expectations.
ats microsoft 365 operating model
A four-stage operational model for a calm, governed tenant
Every Microsoft 365 client we onboard follows the same calm, structured model, combining audit, hardening, day-to-day operations and quarterly strategic review. We manage Microsoft 365 for businesses across West Sussex, including IT support in Chichester.
- Quarterly strategic reviews with your account manager
- Documented configuration baselines and change control
- Named senior engineers who know your tenant
- Proactive recommendations, not reactive tickets
Asses & audit
Independent review of your tenant configuration, identity, devices, sharing, licensing and backup, benchmarked against best practice.
Secure & standardise
MFA, Conditional Access, Intune, Defender baselines, governance and independent backup deployed in a controlled, change-managed sequence.
Monitor & support
Day-to-day support, monitoring of tenant configuration and identities, with named UK engineers and clear escalation paths.
Review & optimise
Quarterly strategic reviews covering security posture, licensing, adoption and roadmap with proactive recommendations.
microsoft 365 backup & recovery
Your Microsoft 365 data is
your responsibility
Microsoft operates a shared responsibility model. They keep the service running your data, retention and recovery is yours to protect. ATS provides independent, immutable backup with tested restores as a standard part of every managed Microsoft 365 service.
Microsoft does not fully backup
Microsoft protects the platform not your data against accidental deletion, ransomware or long-term retention needs.
Independent, immutable data
Third-party backup of Exchange, SharePoint, OneDrive and Teams stored separately and protected from tampering.
Tested recovery
We rehearse restores so we know recovery actually works before it matters.
Ransomware resilience
Immutable copies and clear recovery paths give your business genuine resilience against modern extortion attacks.
mini case study
From a fragmented Microsoft 365 environment to a secure, managed platform
A 60-user professional services firm came to ATS with three different M365 tenants, inconsistent MFA coverage, an unstructured SharePoint estate and no independent backup. Onboarding was manual, leavers retained access for weeks and Teams governance simply didn’t exist.
Within 90 days, ATS consolidated the tenants, deployed MFA and Conditional Access across every account, enrolled all devices into Intune, restructured SharePoint and introduced immutable third-party backup all under a single governed operating model.
100%
MFA coverage
3 1
Tenants consolidated
90 days
Full transition
What clients say
Rated 5.0 on Google by Sussex businesses.
★★★★★
We have been with ATS Connection for years and they have always been reliable. Fast, efficient, and they really know their stuff.
MichelleNorthgate PropertiesGoogle ★ 5.0
★★★★★
Their proactive IT support has saved us a lot of headaches. We can focus on growing our business knowing our IT is sorted.
VickyCallatech EngineeringGoogle ★ 5.0
★★★★★
ATS Connection has been a huge help. Whenever we run into IT issues, they are always there to resolve things quickly.
NicholasNorfolk Arms HotelGoogle ★ 5.0
FAQ
Common questions about managed
Microsoft 365 services
Managed Microsoft 365 services means a single accountable partner takes ownership of your Microsoft 365 tenant including identity, security, devices, SharePoint, Teams, Exchange, licensing, backup and ongoing support under a structured operating model with proactive reviews.
Yes. Microsoft operates a shared responsibility model: they protect the platform, you’re responsible for your data. Native retention is limited and is not a true backup. ATS deploys independent, immutable third-party backup of Exchange, SharePoint, OneDrive and Teams as standard.
Through layered controls: MFA on every account, Conditional Access aligned to risk, Defender for Office 365 hardening, Intune device compliance, identity protection, audit monitoring and independent backup. ATS deploys and manages these as a single security baseline.
Conditional Access is Microsoft’s policy engine that controls how and when users can sign in based on user, device, location and risk. It’s one of the most effective controls against M365 account takeover when configured correctly.
Yes. We govern Teams, channels, external access, SharePoint sites, libraries, permissions and information architecture including restructuring sprawled environments into something secure and usable.
Yes. Hybrid working is the default for most clients we support. We use Conditional Access, Intune device compliance and modern authentication to keep remote access both secure and friction-free.
Yes. We handle Microsoft 365 migrations, tenant-to-tenant moves, mailbox and SharePoint migrations, hybrid Exchange and consolidation projects planned and executed by senior UK engineers. We also design and manage Microsoft Azure environments for businesses moving servers to the cloud.
Our average response time is 15 minutes, with 98% first-contact resolution. Microsoft 365 incidents are escalated immediately to senior engineers.
