Google Message Archiving Microsoft Exchange Journaling Configuration Guide For Exchange Server 2000 and 2003 - Manual (Page 32)

36 Message Archiving - Microsoft Exchange Journaling Configuration Guide
9. Click the Mailbox Manager Settings (Policy) tab, and then do the following:
a. In the When processing a mailbox drop-down menu, select Delete
Immediately.
b. In the Folder list, clear all folders except the Deleted Items folder.
c. Select Deleted Items, and then click Edit.
d. In the Folder Retention Settings dialog box, specify the criteria by which
you want Exchange Server to delete the messages. You can specify a
number of days or the total size of the deleted messages. For example:
e. Click OK.
10. Click OK to close the Properties dialog box and return to the main Exchange
System Manager window.
11. In the pane on the left, open the Recipient Policies folder to list all the
policies.
12. In the pane of the left, right-click the policy that you just created, and then click
Apply this policy now > Yes.
Now that you’ve created a policy, you must schedule when the policy will run.