about check name

dear all

as I know, when I click 'send' inoutlook 2007,it will auto check the address names..is it possible can setup auto check it after I type the address book?

exmaple: I need send to david/tom

when I type david, it will auto show me correct address . And then I can type tom , and do the same..

or I Must click 'check names' for each name?

thanks