The following are requirements for a BlackBerry® Enterprise Server Express and the BlackBerry Enterprise Server Express components that you install on a single computer that uses Microsoft® Exchange. The requirements are for a BlackBerry Enterprise Server Express environment that includes users that receive 100 to 200 email messages each day.

You can improve the performance and reliability of the BlackBerry Enterprise Server Express by installing the BlackBerry Enterprise Server Express components on multiple computers. If you install all BlackBerry Enterprise Server Express components on the same computer as Microsoft Exchange or Windows® Small Business Server, it is a best practice to support up to 75 users only on the BlackBerry Enterprise Server Express. If you want to support more than 75 users on the BlackBerry Enterprise Server Express, it is a best practice to install the BlackBerry Enterprise Server Express components on computers that are separate from the computer that hosts Microsoft Exchange or Windows® Small Business Server.

If your BlackBerry Enterprise Server Express environment supports up to 1000 users, install the BlackBerry Configuration Database on a computer that is separate from the computer that hosts the BlackBerry Enterprise Server Express. If your BlackBerry Enterprise Server Express environment supports up to 2000 users, install the BlackBerry Configuration Database and the BlackBerry Administration Service on computers that are separate from the computer that hosts the BlackBerry Enterprise Server Express.