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ADN-TI — Solutions sur mesure

Microsoft 365 migrations

IMAP, Gmail, on-prem Exchange or tenant-to-tenant — without losing a single email.

Whether you're leaving Gmail, retiring an old Exchange server or merging two Microsoft 365 organizations, a successful migration is won in the preparation: precise inventory, wave-based cutover, and validation at every step. Our clients keep their email, calendars, files — and their productivity.

What's included

Migration from Gmail / Google Workspace, IMAP and on-prem Exchange
Tenant-to-tenant migration (mergers, acquisitions, divestitures)
Multi-tenant collaboration (cross-org synchronization)
Email, calendars, contacts, OneDrive, SharePoint and Teams
Wave-based cutover with coexistence — zero downtime
Post-migration validation and user support

How we work

  1. 1

    Inventory & plan

    Volumes, dependencies, licensing and a wave-based cutover schedule.

  2. 2

    Migration

    Initial sync, controlled waves, coexistence during the transition.

  3. 3

    Validation

    Data verification, device configuration and team support.

Frequently asked questions

Will we lose emails during the migration?

No — synchronization runs in the background while you work, and the final cutover only happens once data is 100% validated.

How long does a tenant-to-tenant migration take?

Two weeks to two months depending on volume and complexity (domains, Teams, applications). The initial inventory yields a precise schedule.

Ready when you are

Ready to take control of your IT?

Book a free 30-minute discovery call. No commitment, no jargon.