If your organization's environment includes only one BlackBerry® Enterprise Server at version 4.0 SP7 or 4.1 SP3 or later, you can upgrade the BlackBerry Enterprise Server to the latest version by overwriting it or by installing the BlackBerry Enterprise Server on a different computer and moving the user data to the upgraded BlackBerry Enterprise Server.

If your organization's environment includes more than one BlackBerry Enterprise Server at version 4.1 SP3 or later, you can upgrade each BlackBerry Enterprise Server instance to the latest version in phases to reduce the risk to your organization's environment and minimize the number of users that are affected at the same time.

For information about upgrading more than one BlackBerry Enterprise Server, see the BlackBerry Enterprise Server Upgrade Planning Guide.