If you are migrating from %BRAND_EXCHANGE_ONLINE_SHORT% 2010 or later, we recommend you configure an %BRAND_EXCHANGE_ONLINE_SHORT% ...

If you are migrating from %BRAND_EXCHANGE_ONLINE_SHORT% 2010 or later, we recommend you configure an %BRAND_EXCHANGE_ONLINE_SHORT% express hybrid deployment instead of using a cutover migration. With an express hybrid deployment, you configure a subset of hybrid features that enable mailbox migration to %BRAND_OFFICE_365_SHORT% with less administrative effort than a full hybrid deployment. Express hybrid deployments do not require users' %BRAND_OUTLOOK_SHORT% profiles to be recreated. If you plan to synchronize your on-premises directory with %BRAND_OFFICE_365_SHORT%, you can configure an express hybrid. If you do not want to maintain directory synchronization, you can use the one-time sync feature of an express hybrid to quickly add and migrate your users to %BRAND_OFFICE_365_SHORT%. If this sounds good to you, see our Express hybrid deployment assistant.