Are your cutover dates slipping because no one owns the full migration sequence end to end?

I participated in 2 full acquisition tenant-to-tenant migrations; each completed in 45 days. The timeline covered M365, Teams, and OneDrive. Most programs blow that deadline before week two because they treat email, SharePoint, and OneDrive as three separate projects instead of one coordinated sequence.

Here’s what actually drives that 45 day window: you need phased email passes running in parallel with SharePoint site moves, not after them. We ran 90 day, 60 day, and 30 day email passes, all completed in under 3 weeks, while simultaneously migrating over 100 SharePoint sites via ShareGate and OneDrive workloads.

The sequencing decision happens before you touch a single tool. Get that wrong and you’re doing rework under production pressure.

What’s causing the most sequencing failures in your current migration program?

#TenantToTenantMigration #Microsoft365 #Migration