The Mailbox Manager utility is automatically installed when you install an Exchange Server 2003 server. The Mailbox Manager utility allows you to configure mailbox recipient policies to manage email retention policies and mailbox cleanup tasks. With Exchange Server 2003, you do not need to configure mailbox management on each specific Exchange server – policies can be replicated through Recipient Update Service (RUS).

Mailbox recipient policies can be configured to:

•Delete mailbox items based on the following:
•Size
•Time
•Age limit
•Specific folders
•Move mailbox items based on the above criteria.
A few preconfigured options that you can specify when configuring mailbox recipient policies are listed here:

•Move to Deleted Items option: This option moves items to the Deleted Items folder in the Exchange mailbox. Items that match certain predefined criteria are included in the move to the Deleted Items folder.
•Move to System Cleanup option: This option creates a partial replica of the mailbox folders, and any items that surpass the predefined criteria is moved to the system folders and are then stored there.
•Delete Immediately option: The Delete Immediately option deletes each item that surpasses the predefined policy criteria.
•Generate Report Only option: Used to determine the impact of initiating a policy to move items or to delete items. The options you can choose between when using the Generate Report Only option are listed here:
•Send Summary Report to Administrator; provides information on the size of all items that are deleted or moved to other folders.
•Send Detailed Report to Administrator; provides information on all items processed and all affected policies and folders.
The Exchange System Manager is used to create mailbox recipient policies in the Recipient Policies container. When you configure mailbox cleanup tasks, you have to define the message size limits and message age limits.

The default values for message size limits and message age limits are listed here:

•Message size limits: 1024 KB
•Message age limits: 30 days