The project plan said 200 mailboxes. BitTitan’s migration scan said otherwise.

The initial scope looked clean. Then the scan ran.

Undocumented shared mailboxes. Permission structures that didn’t match the environment documentation. Oversized mailboxes that needed special handling. Archive mailboxes nobody knew existed. No one had planned for them because no one knew they were there.

The wave schedule had to be rebuilt from the scan results. Batch sequencing changed. The timeline took real pressure. The adjustment held.

To cut manual setup risk at scale, we built 15 Group Policy Objects to handle the file share migration to Azure Files. Automation replaced what would have been hundreds of manual configurations.

Post-migration remediation ran across six counties. The ticket distribution was predictable: Outlook reconfiguration, delegated access gaps, mobile device re-enrollment. Triage moved fast because the environment had been mapped before cutover, not during it.

The documentation organizations hand engineers is almost never complete. The project plan is where you start. The pre-migration scan is where you find out what you’re actually dealing with.

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