The source tenant is the Fabrikam Office 365 organization from which you are migrating users and data. The target tenant is the Contoso Office 365 organization to which you are migrating.

Increase licenses in Target Office 365 organization to accommodate all mailboxes that will be migrated from the source tenant.

Create Administrator accounts in source and target tenants for use in migrating from Office 365 to another Office 365. Some migration tools may require more than one admin account in the source tenant to optimize the data throughput.

To know more about Office 365 tenant Migration, visit O365CloudExperts.

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