The BlackBerry Mail service accepts push registration requests from devices, such as iOS and Android, and then communicates with the Microsoft Exchange Server using its Microsoft Exchange Web Services protocol to monitor the user's enterprise mailbox for changes. When you configure BEMS for Push Notifications support of the BlackBerry Work app, which includes mail, contacts, and calendar, you perform the following actions:

• Configure the Mail service in the BEMS dashboard
• Optionally, configure the Push Notifications service for high availability