I have some mailboxes that are shared between several end users. I want some of these end users to not be able to delete items in the mailbox but yet to still be able to move the items to other folders in that mailbox. Is this possible? And how would it be done?

Well it is not possible it seems, because move item process works like copy item to target folder and delete from source, so move item requires to have delete item permission ultimately. You can set MAPI permission mentioned in below article to access mailbox as read-only. Minimum permissions necessary to access mailbox data http://msexchangeteam.com/archive/2006/01/25/418099.aspxAmit Tank | MVP Exchange Server | MCITP: EMA | MCSA: M | http://ExchangeShare.WordPress.com