EJK Consultancy
Email & Messaging Migration

Exchange to Microsoft 365 Migration Services

EJK Consultancy helps businesses migrate from on-premises Exchange Server to Microsoft 365 with proper planning, controlled cutover and practical post-migration support. We support Exchange 2010, Exchange 2013, Exchange 2016, Exchange 2019 and hybrid Exchange environments.

An Exchange migration is not just moving mailboxes. A successful migration depends on understanding mail flow, identity, DNS, certificates, shared mailboxes, public folders, mobile devices, Outlook profiles, SMTP relay, third-party systems and what Exchange is still doing inside the organisation.

Skipping discovery is where most migration pain starts.

Looking for localised support? Check our Microsoft 365 Consultancy in Northampton, review our Exchange Migration Checklist, or read the UK M365 Migration Cost Guide.

Core Exchange Migration Services

End-to-end technical management for a smooth mailbox cutover.

Migration Assessment

Evaluating existing mail flow, public folder usage, mailbox sizes, certificates, and external application dependencies.

Migration Planning

Designing cutover schedules, user communications, coexistence windows, and fallback options.

Hybrid & Coexistence

Configuring Exchange Hybrid deployment, Entra ID Connect sync, and cross-premises free/busy calendar sharing.

Mailbox Migration

Migrating primary mailboxes, archives, shared mailboxes, and resource calendars in controlled batches.

Mail Flow & DNS

Re-pointing MX records, configuring SPF/DKIM/DMARC records, and ensuring secure outbound SMTP relay.

Post-Migration Support

Assisting users with Outlook profile reconfiguration, mobile sync, and decomissioning legacy Exchange servers safely.

Common Exchange Issues We Resolve

Uncovering hidden bottlenecks before they cause downtime.

Old Exchange servers running unsupported builds
Unknown SMTP relay dependencies
Public folders still used
Large mailboxes causing delays
Shared mailbox permissions not documented
Autodiscover pointing to legacy systems
Mail flow rules nobody has reviewed
Applications still sending through Exchange
Mobile devices needing reconfiguration
Exchange kept only for recipient management

Migration Approach

A structured 7-step process for flawless email cutover.

1

Discovery

Auditing mail flow, mailboxes, distribution lists, public folders, and legacy connectors.

2

Design

Formulating the target hybrid architecture, authentication mechanism, and batching strategy.

3

Pilot

Migrating test accounts to validate mail routing, Autodiscover, and mobile access.

4

Migration Batches

Syncing mailbox data in background waves with zero impact on production mail.

5

Cutover

Updating MX records, finalizing delta syncs, and switching user Outlook endpoints.

6

Validation

Confirming mail deliverability, permissions, and resolving post-cutover queries.

7

Legacy Cleanup

Decommissioning on-premises Exchange servers safely or downsizing hybrid footprints.

Frequently Asked Questions

Everything you need to know about Exchange Server migrations.

If your Exchange environment needs to move to Microsoft 365, start with a proper migration assessment.

Reach out today to discuss your Exchange setup and plan a smooth, risk-free move to Exchange Online.