In some scenarios, the MSA may throw MAPI errors when trying to package the hidden BlackBerry folder in a BES user's mailbox. The purpose of this article is confirm expected behavior in the below scenarios where migration of the hidden BlackBerry folders may not be required. If the mailboxes for these users are being synced to a new Exchange organization in a separate forest, QMM agents may not be required to sync the folder, and therefore setting QMM to skip the hidden folder's message class (SOL73891) may be plausible in the following cross forest migration scenarios:
The below scenarios apply to migrating BES users cross forest only:
Scenario 1 - If user's BES accounts are being reactivated on the target BlackBerry Enterprise Server regardless. When a new user is created on the target BES, the BlackBerryHandheldinfo folder gets recreated in their target mailbox anyway, and new encryption and transport keys to the new BES and Exchange server will be generated within it during the activation process on the target BES. The user's items migrated with QMM will prepopulate to the device as configured on the target BES. Because of this, BlackBerryHandheldinfo items from the source will not be required to migrate.
Scenario 2 - The user's BES accounts are being migrated cross forest using the BlackBerry Enterprise Transporter tool. As per BlackBerry, this method is not fully supported but has worked in the past. The users will be moved from the UserConfig table in the source BES database, and placed in the target BES database. When this occurs, a switch_service command is sent to the user's BlackBerry device to update the information in it's service books to communicate with the new/target BES. In some scenarios while taking this approach, clients have had to reactivate on the target BlackBerry Server regardless. BlackBerry support has stated that this method is not supported by them, nor is it recommended by Quest Software.
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