Calendar Issue – Need a solution

Server is Exchange 2000 SP3 on W2K Adv Srv SP3. Problem and question: Client using Outlook 2000 has resource mailbox A and resource mailbox B added to his profile. These two mailboxes are displayed in the left pane of Outlook along with his own user mailbox. Meeting request is sent to mailbox B and also forwarded to Mailbox A. When the meeting request
is accepted in mailbox A, it is added to mailbox A’s calendar. How do I get it to be added to mailbox B’s calendar as well? Thanks.