CAL keys control how many user accounts can exist on a BlackBerry® Enterprise Server at the same time. When you exceed the number of licensed user accounts, the BlackBerry Manager informs you that you require more CAL keys.

If you use a temporary evaluation version of a CAL key and the CAL key expires, the BlackBerry Dispatcher turns off automatically, stopping all synchronization between the BlackBerry Enterprise Server and BlackBerry devices. You must purchase a new CAL key before you can restart the BlackBerry Dispatcher. If you use a temporary evaluation CAL key, you cannot reuse that CAL key after you purchase a permanent CAL key.

To help you transfer CAL keys to computers in other BlackBerry Domain instances, or to troubleshoot CAL key issues, you can copy the CAL keys from the BlackBerry Manager to a text file.

• Add or delete a CAL key
  
• Copy a license key to a text file