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Microsoft 365 Migrations & Strategy

Email Migration - Exchange

Running Exchange on-prem is costly, complex, and risky to maintain.

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On-Premise Exchange to Microsoft 365 Email Migration

Running Exchange on-prem is costly, complex, and risky to maintain. We migrate on-prem Exchange to Microsoft 365 safely, reducing infrastructure overhead while keeping email, calendars, and users fully operational throughout the transition.

A Complete End-to-End On-Premise Exchange to Microsoft 365 Service – Scoping, Consulting, Migration and Support.

Built for organisations moving from on-prem Exchange to Exchange Online.

Hybrid Migration Experts

We migrate Exchange environments every day.

Minimal Downtime

Email continues flowing throughout migration.

Identity & Security First

Entra ID, authentication, and security done properly.

Future-Ready Platform

Microsoft 365 configured beyond email.

On-Prem Exchange to Microsoft 365 Email Migration

We migrate mailboxes, calendars, contacts, and permissions from on-prem Exchange to Exchange Online. Using hybrid or staged approaches, we ensure coexistence, controlled cutover, and a clean transition in or out of hours to avoid disrupting day-to-day operations.

Modernising Beyond Email

Moving to Microsoft 365 unlocks more than hosted email. We help configure Teams, SharePoint, and OneDrive, enabling secure collaboration while reducing reliance on legacy servers and on-prem infrastructure.

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How We Work

A specialist five-stage migration process for a secure, low-risk transition from legacy servers to the Microsoft 365 cloud.

  1. 1

    Assess

    Review Exchange version, AD health, and infrastructure readiness.

  2. 2

    Prepare

    Configure Entra ID, security, and coexistence.

  3. 3

    Migrate

    Move mailboxes to Exchange Online safely.

  4. 4

    Decommission

    Retire on-prem Exchange cleanly and securely.

  5. 5

    Support

    Training and on-going support packages available.

Why Moving from On-Prem Exchange Is a Big Step

On-prem Exchange migrations aren’t just technical upgrades. They impact security, identity, email flow, and how IT teams support their business.

Legacy Infrastructure

Aging servers increase downtime, patching effort, and security risk.

Complex Dependencies

Exchange is tightly linked to Active Directory and legacy systems.

Business-Critical Email

Any disruption to email impacts the whole organisation.

Trusted by Leading Organisations

Sony
AstraZeneca
BBC
Shell
Princes
Sony

“The PowerApps solution transformed our approval process from weeks to hours. The team delivered exactly what we need on time and within budget.”

Sarah Johnson, Operations Director TechCorp

“Exceptional expertise and communication throughout the project. Our custom inventory app has saved us countless hours.”

Michael Chen, IT Manager, RetailPlus

“The PowerApps solution transformed our approval process from weeks to hours. The team delivered exactly what we need on time and within budget.”

Sarah Johnson, Operations Director TechCorp

We’re Microsoft Solutions Partners:

Chester Zoo
Shape Talent
Rincon
Astra Zeneca

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Frequently asked questions

Yes. Valto email migration experts design and deliver hybrid Exchange migrations where required, enabling coexistence between on-prem Exchange and Microsoft 365 during the transition. Ready to cut over whenever you are ready.  
In most cases, no. We use staged or hybrid approaches so email continues to flow while mailboxes are migrated in the background. We are happy to run migrations out of hours to minimise any impact on your employees.  
Yes. Our email migration consults will work with you to understand your exact requirements. We can migrate shared mailboxes, distribution groups, and public folders, ensuring access and permissions are preserved in Microsoft 365.  
We assess and advise on Active Directory as part of the migration. This includes identity sync, security hardening, and guidance on long-term AD requirements. You can either choose to action the advise yourself or we can offer fixed price proposal to action the advice.  
Yes. Once migration is complete the email migration experts here at Valto can safely decommission Exchange servers, helping you reduce infrastructure cost and security risk. 
Absolutely. Our Microsoft 365 consultants are not just experts of email migration we can also configure Microsoft Teams, SharePoint, and OneDrive as part of the project if you wish. This ensures Microsoft 365 delivers real collaboration benefits beyond just email. 

Talk to us about Email Migration - Exchange

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