Then can save to a personal folder and give person. Understand the concept of cost for address space and connectors for routing or not routing certain mail. Each connector can have multiple sites connected to it. 100 would be used if none else available. Costs are cumalitive so if a direct line costs 10 but 2 hop line costs 5 and 3 it would go the latter route.
Lowest cost is chosen when routing messages.
MTA handles routing. Understand Deleted Item Recovery and how your backup strategy might effect the user's ability to recover their data. Server side invisible recycle bin. 60 day retention time will not delete if past 60 days until backed up, then it will be deleted. Imap or mapi must be used to recover if it was used to delete it.