if you just send them an invitation you will hope they will read your email and fill out the form. If you know their email enter is in their profile by going to the "Manage Classmates" tab then click on "Enter/Edit Classmates"  Filter By year (pick year)  find the classmate and click on their "Details" tab  enter Primary email address and any other information on that classmate. Most important "Save Changes" at the bottom of the page. They will get all of our newsletters and can log-in and set their password anytime. We have Administrative rights and are the only ones that can do this, So have fun!!!!!!!!!!!!!!!