How-To Geek

Could somebody please try and give me a link or preferably explain how when installing sbs 2008 they ask for a domain name it is explained that i can use my
existing domain name My main query is when i or my workmates wan tto connect to the server rather than our website, microsoft in the installation notes says use the default which is remote.example.com please expalin how from an installation point of view the weblink directs itself to the sbs server rather than our webste as the explanation notes are not clear I am fully conversant in dns server & networking terms but this is hard to find the info on any help really WOULD be most appreciated thank you Jonathan