Create a new CardDAV address book

Switch to adress book tab, click New Address Book / Add CardDAV Address Book:

Enter username and location (adjust port to your settings): http://localhost:1080 or point to a specific contact folder: http://localhost:1080/users/mail@company.com/contacts

Enter password, for older Exchange servers you may have to adjust username to your windows account name, i.e. domain\account:

Select the contact folder(s) you want to synchronize and click Continue

Synchronization should start automatically.