


If using a third-party migration tool to migrate your users, purchase the needed licenses for your migration. The final addressing scheme was chosen for simplicity and brevity but can of course be modified to meet your requirements.

When complete, all Fabrikam accounts will exist in the Office 365 organization, and will all use for the UPN. This scenario assumes that user, group and other objects from the Fabrikam Company will be manually created in Office 365, imported into the portal via script, or merged into the Contoso Active Directory through Active Directory Domain Services (AD DS) consolidation. Scenario: Migrate using a third-party migration tool Contoso has purchased Fabrikam and is moving the Fabrikam users and data to the Office 365 organization. The scenario in this article is based on two fictional companies - and - using two separate Office 365 organizations. If you have more than 500 users to migrate or a large amount of SharePoint data to migrate, it's a good idea to work with a Microsoft solution provider. This article explains how to migrate mailboxes and service settings from one Microsoft 365 or Office 365 organization to another Microsoft 365 or Office 365 organization in a business-merger scenario. At this time, we have a Public Preview of the native Cross-tenant mailbox migration located at
