How to send and accept calendar event invitations on iPhone and iPad

[iMore.com]

When you're creating an event or appointment in the iPhone or iPad Calendar app, you might want to add other people to it, and alert them about it. That's where invitations come in. If you're using a calendar service that supports it, like Apple's iCloud service or Microsoft's Exchange, all you need are the email addresses for the people you want to invite.

Full story from the iMore Blog...