Before you decommission source tenant access at the end of a BitTitan migration program, confirm you have completed the validation work that proves the migration is actually finished.

A proper BitTitan migration closure follows a defined set of checks before removing access to the source tenant. If source tenant access is decommissioned too early, you lose the ability to remediate migration gaps that may only become visible after closure.

A typical closure sequence is: verify all BitTitan migration jobs have completed their final pass and item counts are within acceptable tolerance compared to source mailbox statistics; validate a sample of migrated accounts in the destination tenant by opening mailboxes, testing calendar access, and confirming OneDrive content; export the final BitTitan project data and archive it as the migration audit record; communicate completion and obtain business stakeholder sign-off; decommission the migration service account in the source tenant and remove the BitTitan endpoint credential; archive or delete the BitTitan project according to your documented retention policy.

One key risk is skipping business stakeholder sign-off before shutting down source access. If someone later reports missing content and the source is already inaccessible, the migration team cannot confirm whether that content existed in the source at the time of migration, making remediation significantly harder.

Have you documented a BitTitan migration closure sequence that includes business stakeholder sign-off before source tenant decommissioning?

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