I have a world press blog that I am trying to share with my students. I type in their email addresses and I can see that they are pending, but they don’t get the invitation. when I type in my email address (the one not associated with the is comes right through to me.
At the bottom of your “Invite New” (Users > Invite New) screen, you can see the list of everyone you’ve invited. For the users who are still listed as “Waiting” you can re-send the invite. The invitation may have timed out, or they may not have completed the steps to create their WordPress.com account.
Try that first, and if they still aren’t able to see the invitation, just let me know!