 Description: Upgrading to BlackBerry Enterprise Server version 4.1
When you upgrade to BlackBerry Enterprise Server® version 4.1, the changes to your BlackBerry® environment depend on the version from which you are upgrading.
If you are upgrading from BlackBerry Enterprise Server version 3.5.2 or BlackBerry Enterprise Server version 2.1.5,
the upgrade process updates your BlackBerry Enterprise Server software, removes Microsoft® administrative
extensions, creates a new schema for the BlackBerry Configuration Database, and migrates users to the new schema.
If you are upgrading from BlackBerry Enterprise Server version 3.6, the upgrade process updates your BlackBerry Enterprise Server software, consolidates BlackBerry Enterprise Server instances, creates a new schema for the configuration database, and migrates users to the new schema.
You can preview the user migration into the configuration database to identify any issues that might occur (for example, identifying inactive users that you cannot migrate) and to estimate the time that it should take to migrate users during the upgrade process.
If you are upgrading from BlackBerry Enterprise Server version 4.0, the upgrade process updates your BlackBerry Enterprise Server software, including any BlackBerry components that you installed separately (for example, the BlackBerry Manager), and upgrades the schema of the configuration database.
In a mixed-version environment that includes BlackBerry Enterprise Server version 3.6 and earlier and BlackBerry
Enterprise Server version 4.0 or later, your Mobile Data Service push server must be version 4.0 or later.
After you upgrade the Mobile Data Service to version 4.1, the service name becomes BlackBerry Mobile Data System™ (BlackBerry MDS™) Connection Service.
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