During the BlackBerry Enterprise Activation process, the BlackBerry smartphone sends a message containing a file called ETP.DAT file, which contains activation information, to an activation email address stored on the BlackBerry device.

Once the user selects Activate in the Enterprise Activation application on the BlackBerry smartphone, the following actions occur:

1. The ETP.DAT message is sent to the BlackBerry Infrastructure, which forwards it to the email address that was typed in the Enterprise Activation application.
   
   
2. The BlackBerry Enterprise Server, which monitors the BlackBerry device user’s mailbox, picks up the ETP.DAT message.
   
   The activation process begins.
   
   
3. The BlackBerry Enterprise Server sends the acknowledgement and encryption information to the BlackBerry smartphone.
   
   
4. The IT policy is sent to the BlackBerry smartphone.
   
   Once the BlackBerry Enterprise Server verifies that the policy has been applied successfully, it sends the required service books to the BlackBerry smartphone.
   
   
5. When the BlackBerry Enterprise Server has sent all the required information to the BlackBerry device, the following message is displayed:
                            Your email address “<This email address is being protected from spambots. You need JavaScript enabled to view it.>” is now enabled
   
   
6. The synchronization process begins.