Managing Some one elses mail contacts

Our Administrative assistant manages the CIO's Mail contacts. When she tries to create a group in his addressbook and tries to choose members from his mail contacts, it won't give her a list of his contacts in his personal contacts. It just brings up the usual options, her personal address book, the Domino address book, and our secondary address book.

If there a way that she can create a group in his address book and then choose names out of his address book?

We have our personal address books synching with the mail files. So she goes to the little thingy next to his name and Switches to Mail contacts:





Thank you for any suggestions.