This activation password is used only to activate your mailbox. The password is invalid after five unsuccessful activation attempts, and if you do not activate your handheld within 48 hours after the password is created, the password expires and cannot be used. When the handheld is successfully activated, the password is removed from the BlackBerry® Enterprise Server.
The activation password can be reset in CONTROL PANEL > Services > BlackBerry > Display name of a user by administrators and in My Services > BlackBerry by users.
BlackBerry is a registered trademark of Research In Motion Limited.