If you are using Blackberry Enterprise Server, no additional setup is needed. If you have a TRO-capable Blackberry app that syncs with Outlook or Entourage, install it using the publisher’s instructions.
Install REXconnect on your Blackberry. REXconnect (at www.rexwireless.com/individuals-rcx.php) [US $15, free 14-day trial] makes it incredibly easy to convert emails to Outlook tasks on your Blackberry. This makes a huge difference when you are away from the office.
If you will use an Exchange-compatible online mobile task list instead make sure you bookmark it.