Oh, and maybe this may also be helpful...

My configuration is as follows (taken from File | Accounts):
* Email:
- Johan@mycompany POP/SMTP (standard, send/receive from this account)
- johan@myother Microsoft Exchange
* storage files
- Internet calendars c:\users\Johan\Appdata...\InternetCalendar-Johan.pst
- johan@myother c:\users\Johan\Appdata...\johan@myother - Johan.ost
- johan@mycompany c:\local\mail\johan@mycompany.pst
* Addressbooks
- Addressbook for mobile devices MAPI
- Outlook-adresbook MAPI
When I open "Contacts", the navigation panel on the left hand side shows:
- Proposed contacts - johan@mycompany
- Contactpersonen (these seem to be tied to Outlook, because they are named "Contactpersonen" Dutch for "Contacts", which matches my Outlook language)
- Contacts (the English named set of contacts, which matches the language of my Exchange. They got added when I added the Exchange account)
- Proposed contacts - johan@myother