Plan mailbox migration around data, people and cutover timing.
Discuss your needsAssessment / Migration planning / Validation
Confirm mail, calendar and contact requirements and workload-specific support.
Account for user communication, batches and acceptable change windows.
Define validation, track exceptions and document handover items.
Confirm endpoints, data volume, permissions and connections.
Test representative accounts and agree batches and exception handling.
Execute the agreed migration and track progress and exceptions.
Check results and document remaining actions and cutover guidance.
Confirm the environment, permissions, data scope and acceptable change windows. No passwords are needed for an initial consultation.
Support depends on source, destination and connection method. Identify each data type, account count and volume, then validate the supported scope with representative accounts.
Agree acceptable change windows, user cutover steps and source-system limits before planning batches and communications. Any operations that must pause should be identified during the pilot; uninterrupted service is not assumed.
Scope, timing, responsibilities and validation are agreed after assessment. The process shown here is a starting point; actual delivery follows the agreed scope.
A mailbox migration needs more than a transfer date. Source systems, permissions, data scope and acceptance responsibilities must fit together. This guide introduces five questions for IT teams and business owners to agree on before the project starts, creating a shared basis for preparation, pilot migration and cutover decisions.
Read full article ：Five questions before a mailbox migrationFind the right approach, solution and tools for your business.
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