Upgrade Guide
4.
Upgrade instances of the central push server for BlackBerry MDS Connection Service to the new version.
5.
Upgrade the empty BlackBerry Enterprise Server to the new version using an in-place upgrade process.
6.
Repeat this task until all BlackBerry Enterprise Server instances are running the new version of the software.
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Upgrading BlackBerry Enterprise Server Version 4.0 and earlier versions in phases