“BlackBerry® Enterprise Server Express enables businesses of any size to quickly and easily get started with the BlackBerry solution. It provides advanced BlackBerry smartphone features with no additional software or user license fees, and works with any Internet-enabled BlackBerry data plan or a BlackBerry enterprise data plan.”
ok… but how. Over the Air (OTA) activation only shows up in OPTIONS, ADVANCED, ENTERPRISE ACTIVATION if you have a BES account. The solution to use DESKTOP MANAGER (v5 or older) or BLACKBERRY DESKTOP SOFTWARE (v6 or newer).