CartMicrosoft Teams Migration Assessment
A Microsoft Teams migration assessment is the discovery stage used to understand the source Teams environment, target readiness, Team-site mapping complexity, workload boundaries and operational risks before a Microsoft 365 tenant migration begins.
For EdbMails projects, the assessment should produce the inputs required for source and target preparation, Team-site selection, source-to-target mapping, migration waves, incremental migration and target validation.
Assess the source Teams environment
Identify every Team site that may be in scope. Record the business owner, destination requirement, approximate workload size and whether the Team contains workloads that need separate Channel or Private/Group Chat migration.
Assess target Team-site readiness
For each source Team site, confirm the intended target Team site.
Identify missing destinations, renamed Teams, different target structures and any Teams that may need to be created before migration.
Assess mapping complexity
Classify mappings as straightforward, renamed, restructured or exception. This helps estimate how much manual review will be required after EdbMails loads the source and target Team sites.
Assess workload boundaries
Separate broad Teams site migration from Channel Migration and Private/Group Chat Migration. EdbMails documents these as distinct workflows with separate app-registration requirements.
Assess administrator and Microsoft Entra readiness
Confirm the administrators required for the source and target tenants are available and that the project can create the necessary Microsoft Entra application registrations. Keep the correct app-registration workflow aligned to the migration workload.
Assess migration-window and throughput constraints
Estimate the number of Team sites, expected workload volume, network conditions and available migration window. Multiple Team sites can be migrated, but throughput can still vary with Microsoft 365 service behavior, throttling, source activity and destination readiness.
Assess active-source change risk
Determine whether users will continue working in source Teams while migration is in progress. If they will, include an incremental migration stage and preserve the migration environment required for the documented local incremental check.
Assess validation requirements
Define how migration success will be measured.
Include log review, representative Team-site validation, user-access checks and separate validation for Channel or Chat workloads where those are in scope.
Assessment output
The assessment should result in a Team-site inventory, source-to-target mapping plan, workload classification, pilot list, migration waves, Entra readiness status, incremental strategy and validation checklist.
Frequently Asked Questions
What is a Microsoft Teams migration assessment?
It is the discovery stage used to understand the source Teams environment, target readiness, Team-site mapping complexity, workload boundaries and operational risks before a tenant migration begins.
Why assess Teams before migrating?
The assessment produces the inputs required for source and target preparation, Team-site selection, source-to-target mapping, migration waves, incremental migration and target validation.
What should I assess in the source environment?
Identify every Team site that may be in scope and record the business owner, destination requirement, approximate workload size and whether the Team contains workloads that need separate Channel or Private or Group Chat migration.
How do I assess target Team-site readiness?
For each source Team site, confirm the intended target site and identify missing destinations, renamed Teams, different target structures and any Teams that must be created before migration.
How do I assess mapping complexity?
Classify mappings as straightforward, renamed, restructured or exception to estimate how much manual review will be required after EdbMails loads the source and target Team sites.
How do I assess workload boundaries?
Separate broad Teams site migration from Channel migration and Private or Group Chat migration, which EdbMails documents as distinct workflows with separate app-registration requirements.
How do I assess administrator and Microsoft Entra readiness?
Confirm the required source and target administrators are available and that the project can create the necessary Microsoft Entra application registrations, keeping the correct app-registration workflow aligned to the workload.
How do I assess throughput constraints?
Estimate the number of Team sites, expected workload volume, network conditions and migration window. Multiple Team sites can be migrated, but throughput still varies with Microsoft 365 behavior, throttling, source activity and destination readiness.
How do I assess active-source change risk?
Determine whether users will keep working in source Teams during migration. If they will, include an incremental migration stage and preserve the environment required for the documented local incremental check.
What validation requirements should I assess?
Define how success will be measured, including log review, representative Team-site validation, user-access checks and separate validation for Channel or Chat workloads where those are in scope.
What are the assessment outputs?
A Team-site inventory, source-to-target mapping plan, workload classification, pilot list, migration waves, Microsoft Entra readiness status, incremental strategy and validation checklist.
