Email migration to Microsoft 365. Every email. Zero loss.
Whether you are leaving a hosted Exchange provider, an IMAP service, or a legacy on-premise system, IP Four migrates your mailboxes to Exchange Online with full fidelity and no disruption to your business.
Every migration method, every source platform.
From simple cutover migrations to complex hybrid deployments, we have the tools and experience to move your email to Microsoft 365 without losing a single message.
Cutover Migration
Move all mailboxes to Exchange Online in a single cutover event. Ideal for businesses with fewer than 150 mailboxes. Completed outside business hours to minimise disruption.
Staged Migration
Migrate mailboxes in batches over weeks or months. Allows large organisations to transition gradually while both environments remain live. Coexistence managed throughout.
Hybrid Migration
Deploy a hybrid Exchange configuration to enable seamless coexistence between on-premise Exchange and Exchange Online. Mailboxes moved at your pace with full calendar and free/busy sharing.
Full Mailbox Fidelity
Every email, folder, calendar entry, contact, task, and note migrated with full fidelity. Folder hierarchy preserved. Sent items, drafts, and deleted items all included.
DNS and MX Record Management
MX records, SPF, DKIM, and DMARC all updated as part of the migration. Email flow tested before and after cutover. No mail lost in transit during the switchover window.
Post-Migration Monitoring
Mail flow monitored for 30 days post-migration. Any delivery issues resolved immediately. Users supported through the transition with direct access to the migration team.
A six-stage process built around zero surprises.
Every email migration follows the same proven process. Discovery first, destination prepared, data pre-synced, cutover executed, validated, and supported for 30 days.
Mailbox Discovery and Sizing
We audit every mailbox in your current environment. Sizes recorded, shared mailboxes identified, distribution groups catalogued, and any oversized or corrupted mailboxes flagged before migration begins.
Exchange Online Preparation
Exchange Online configured in your Microsoft 365 tenant. Licences assigned, accepted domains added, connectors configured, and security baseline applied. The destination is fully ready before any data moves.
Pre-Migration Sync
Mailbox data pre-synced to Exchange Online in the background while your existing email system remains live. Delta syncs run continuously so the final cutover window is as short as possible.
Cutover and DNS Update
MX records updated to point to Exchange Online. Final delta sync completed. Users reconfigure Outlook or receive auto-configuration. Mail flow confirmed. Old system decommissioned on schedule.
Post-Migration Validation
Every migrated mailbox checked for completeness. Mail flow tested from internal and external senders. Spam filtering, archiving, and retention policies verified. Any issues resolved within the same business day.
30-Day Hypercare Support
Direct access to the migration team for 30 days post-cutover. Mail flow monitored daily. User queries handled promptly. Any edge cases resolved without additional cost.
Email migrations delivered across the UK.
Hosted Exchange to Microsoft 365
A 60-person law firm in Manchester was paying a third-party provider for hosted Exchange. Costs were rising and the firm wanted to move to Microsoft 365 Business Premium for the full suite of productivity and compliance tools.
All 60 mailboxes migrated to Exchange Online over a single weekend. Folder structures preserved, calendars intact, and Outlook reconfigured automatically via Autodiscover. Firm was fully operational on Monday morning with no data loss.
IMAP Provider Exit
A Yorkshire accountancy practice was using a budget IMAP email provider with no calendar sync, no shared mailboxes, and no compliance archiving. They needed a proper business email platform.
IMAP mailboxes migrated to Exchange Online. Calendars rebuilt from local Outlook data. Shared mailboxes created for accounts and admin teams. Litigation hold enabled for compliance. Total migration time: four days.
Multi-Domain Email Consolidation
A Birmingham property group had acquired three businesses, each with their own email domain and provider. Staff were confused by multiple email addresses and IT was managing three separate systems.
All three email domains consolidated into a single Microsoft 365 tenant. Primary and alias addresses configured. Shared calendars and Teams deployed across all brands. IT overhead reduced significantly.
Ready to move your email to Microsoft 365?
Tell us your current email platform and how many mailboxes you have. We will come back with a migration plan, timeline, and fixed-price quote within 48 hours.
Fixed-price migrations. No hidden costs. 30-day post-migration support included.