I use Google Apps for personal use and of course Google Calendar. I love to invite people using Google Calendar to meetings and they have a nice link to say "YES!" and so on.
But Google Calendar always warns me, that I try to invite people who are NOT in my organization. Because I am alone in my Google Apps organisation, I assume that happens a lot more in the future.
How can I disable this security question?
Best Answer
To enable/disable external invitation prompts, you must have an Administrator account. This will open the Google Admin console.
From the dashboard, go to Apps > Google Apps > Calendar > Sharing Settings > External invitations.
Choose ON or OFF for the setting.