Outlook contacts & AD sync

We have Exchange 2010 SP1 & Outlook 2010.

Whenever you copy a contactperson from the GAL into your local contactpersons list, you have the ability afterwards to update the contact's details with information out of the organization's address book.
Two questions:
1. This can be done manually, by opening a contactperson's card, and select the "update" button. Is there a way to do this sync automatically?
2. Whenever you erase a value in AD (i.e. the department's name), and you do a manual update in the contactperson, the value is not being erased there???,
Any suggestions??

thanks in advance,
Peter