Start with the environment, not the migration tool
The technical act of moving mailboxes or files is only one part of a modern workplace migration. Before a cutover plan is useful, the organization needs a clear picture of users, domains, identity sources, devices, shared resources, permissions, mail flow and the applications that depend on the current environment.
That baseline determines what can move cleanly, what requires remediation and what should be redesigned instead of copied forward.
Identity becomes the control plane
Once Microsoft 365 becomes a core business platform, identity and access management become central to how the environment is secured and administered. Account lifecycle, multifactor authentication, privileged access and administrative role design should therefore be part of the migration conversation from the beginning.
- Define who owns user provisioning and deprovisioning.
- Separate day-to-day user access from privileged administration.
- Establish MFA and recovery processes before the environment becomes business-critical.
Migration should leave administration simpler
A successful project should reduce uncertainty for the people who will operate the environment after handover. That means documenting tenant settings, DNS changes, licensing, user groups, administrative responsibilities and support procedures in a form that the client can actually use.
The best end state is not merely “everything moved.” It is an environment that is easier to understand, support and improve.