There has been a big change in recipient management from Exchange 2003 to Exchange Server 2007. Exchange Recipient Management is the second biggest administration component of Exchange 2007, which ranks as top Exchange key component with respectable incident volume and an amount of supporting labor.
In Exchange Server 2007, you can do most of your recipient management tasks in both the Exchange Management Shell and the Exchange Management Console. For tasks that involve single recipients, it is usually simpler to use the Exchange Management Console (unless you are immune to typos). However, when you are trying to configure multiple recipients, there simply is no alternative to the power and ease of using the Exchange Management Shell. A new article was recently released that aims to help customers deal with bulk exchange recipient management more efficiently. Please click the link below to view this article at TechNet for details:
Using the Exchange Management Shell for Bulk Recipient Management