aalaan wrote:

OK. Getting this now I think. So 'contacts folder' really does the
same thing as 'address book' and this is only a nomenclature thing?

Um, no. The Contacts folder is where you keep your contacts, their street
addresses, phone numbers, email addresses, fax numbers, mobile phone
numbers, and so on. The address book is an interface into that folder that
allows Outlook to "resolve" electronic addresses (email addresses and fax
numbers) to as to be able to construct a message that will be able to reach
the recipient electronically. The "address book" can show you many contacts
folders, if you have them and your've enabled the option to have them appear
in the address book view.

Presumably the contacts folder is in the PST file together with the
actual emails sent/received (I am devising a backup strategy, in
passing).

Yes. No need to devise a backup strategy when one already exists. In its
simplest form, it's just "copy the PST while Outlook is closed". FOr a more
complete discussion, see
http://www.howto-outlook.com/howto/backupandrestore.htm

Also, if I opt to place details of a sender in my contacts
folder, do I then have the option of toggling a setting to make their
whole email address appear in future?

If you put a person into your Contacts folder, you can adjust the "Display
As" field, which is what you'll see in the recipient field when you send a
new message to that person. What you see in the sender field when you
receive a message will always be up to the sender.
--
Brian Tillman