Name completion in Outlook does not work for all address books

When creating new email, typing a name into the "To..." box and selecting the "Check Names"-button, only the outlook address books and the groupwise system

address book are searched. Additional groupwise address books (i.e. books created using the groupwise client or books shared with the current user) are not searched for name completion. This is even true if you explicitly add the address book the the list of books to be searched (in the outlook address book's "options" dialog).

This issue has been reported to engineering.