I created a Google calendar, added some events to it, and then invited a group of people --- some with GMail addresses, most with other accounts --- to attend via the Guests option for that event.They all got the invite, but in almost all cases, only responded to me by e-mail, rather than clicking one of the Yes, Maybe, No options in their invite. On further investigation, it seems that these options aren't appearing in their e-mails at all.I tried sending invites to two other accounts I maintain (one GMail, one Yahoo), and the options did appear for me.Any ideas?
No Going? response options visible in Google Calendar event invitations
google calendar