Are you skipping BitTitan pre-migration assessment and only discovering source tenant configuration issues when the first pre-stage pass begins?

MigrationWiz includes an assessment function that scans source tenant mailboxes and reports key data such as object counts, mailbox sizes, item counts, and configuration issues that can affect migration behavior. Running the assessment before any pre-stage passes start gives you time to remediate problems instead of reacting to them mid-flight.

Common findings from a BitTitan assessment include: mailboxes where the source UPN does not match the primary SMTP address, which can cause user mapping failures in MigrationWiz; mailboxes with item counts far above the project average, which can skew scheduling assumptions; shared mailboxes missed during the initial account audit; and inactive or disabled accounts that accidentally made it onto the user list.

The assessment results also help you build a realistic schedule by showing the actual source-side mailbox size distribution. When you combine BitTitan published throughput benchmarks with real mailbox size data, your duration estimate is typically much closer to what the migration will actually take than a plan built on assumptions.

Have you run a BitTitan pre-migration assessment against your source tenant before starting pre-stage pass configuration?

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