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Service

Email
Migration

Move your organisation email to Microsoft 365 Exchange Online from any source platform — complete message history, folder structures, and contacts fully preserved.

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Overview

What this migration involves

Email is the most critical communication tool in any organisation. A poorly executed migration causes immediate, visible disruption to every user. CloudyNex approaches email migrations with the precision that this reality demands.

Whether migrating from a hosted mail service, a legacy on-premise server, a web hosting platform, or another cloud mail provider, CloudyNex has the tooling and methodology to execute it cleanly.

What we migrate
  • All mailboxes with full message history
  • Folder structures and organisation preserved
  • Sent items, drafts, and deleted items
  • Contacts and contact groups
  • Calendar events and recurring appointments
How It Works

The migration path

A clear, structured path from source to destination — with CloudyNex managing every step.

Any Email Platform
Hosted · on-prem · cloud
via CloudyNex
CloudyNex
Migration engine
arrives at
Exchange Online
Microsoft 365 mail
Business Challenges

What makes this migration complex

01
DNS transition risk

Changing MX records is the critical moment in any email migration. Poor timing or sequencing can result in mail being delivered to the wrong server during the transition.

02
Platform-specific limitations

Different source platforms expose different amounts of data via their migration APIs. Some limit historical migration depth or impose connection rate limits.

03
Large mailboxes

Users with very large mailboxes require additional time to pre-stage and may need archiving decisions made before migration begins.

Our Process

How we run the migration

01 — Assessment
Source assessment
Audit of source mail platform, mailbox sizes, migration API capabilities, and rate limiting characteristics.
02 — Planning
Migration plan
Batch sequence, cutover schedule, rollback plan, and user communication templates agreed.
03 — Pre-stage
Historical sync
All historical email synced to Exchange Online before MX cutover to minimise the live migration window.
04 — Cutover
MX update
MX records updated. Final delta sync to capture mail received during migration. Delivery to Exchange Online verified.
05 — Verification
Integrity check
Post-migration reconciliation confirms all mailboxes transferred. Any discrepancies investigated and resolved.
06 — Hypercare
Post-migration support
7-day priority support. Device configuration assistance. Source platform maintained until sign-off.

Need help with this migration?

Contact our migration specialists today.

Request a Free Consultation
FAQ

Frequently asked questions

No. Our pre-staging approach ensures all historical data is in Exchange Online before the MX record changes. The cutover window where in-flight email could be affected is minimised to minutes, not hours.
Devices configured via IMAP reconnect automatically to Exchange Online after MX cutover. Devices configured via POP3 need reconfiguring. We provide user communication templates for device setup.
We migrate all email accessible on the source platform. There is no imposed historical limit from our side. Some platforms have retention policies that limit what is available to migrate.
Get Started

Ready to migrate
your email?

Tell us about your environment. We will assess the complexity and give you a clear, written migration plan.

Request a Free Consultation About CloudyNex

No commitment required · Response within one business day · sales@cloudynex.co