With an %BRAND_EXCHANGE_ONLINE_SHORT% Server 2013 hybrid deployment, you're able to maintain a mix of on-premises mail users ...

With an %BRAND_EXCHANGE_ONLINE_SHORT% Server 2013 hybrid deployment, you're able to maintain a mix of on-premises mail users and %BRAND_OFFICE_365_SHORT% mail users. To make that happen, you'll set up directory synchronization and %BRAND_EXCHANGE_ONLINE_SHORT% hybrid services. After configuring your hybrid deployment, you'll manage both your on-premises and %BRAND_OFFICE_365_SHORT% mailboxes from an on-premises %BRAND_EXCHANGE_ONLINE_SHORT% server through the %BRAND_EXCHANGE_ONLINE_SHORT% %BRAND_ADMIN_CENTER_PREVIEW%.