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I have a simple event in iCal with one attendee. I sent an invitation to the attendee via iCal and they accepted the invitation.

When I double click on the event or do Get Info, it shows the attendee with a green check mark next to their name (I assume this indicates the acceptance of the invitation). However, the event in iCal shows an icon of a person with a question mark next to their name. Why? Do I need to do something further to complete the event?

I am running Lion and have iCal 5.0, but the most recent information about symbols on Apple's site that I could find is for iCal 3.0. According to that information, the question mark indicates a tentative acceptance. This makes no sense considering the single attendee accepted the event (not tentatively).

I have the setting to Automatically retrieve CalDAV invitations from Mail turned on.

I tried obvious things like closing and re-opening iCal.

Here's a screenshot of the event:


And a screenshot of the same event expanded:

Event expanded

share|improve this question
Are the people on the same network as you are (e.g. the same exchange server)? I only ask because in outlook, people outside of my exchange server always show tentative. – Raystafarian Mar 26 '12 at 11:11
@Raystafarian Yep, same Exchange server (and same LAN). – Nate Pinchot Mar 26 '12 at 16:27

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