Occasionally you may want to include people in your Address Book or invite them to a shared Workspace but do not know their user names or the email addresses that they have registered with the BSCW server. BSCW's user search function may be quite useful in this case.
on the top button bar;if the last search had not been a user search,
to bring up the 'User search' form that lets you specify your query (more in section 4.10).