Shared Office 365 calendars not showing up in iCal
We are using Microsoft's Office 365 and have users with a variety of devices and applications (Mac/iCal/Mail, Windows/Outlook, iPhone, Android, etc.).
I am the administrator of the Exchange accounts. I have created four calendars that are viewable by everyone within our organization (just general "company-wide calendars").
Users with Outlook are able to view those shared calendars just fine. However, I'm not able to add the shared calendars with users using iCal.
If I add them as a delegate, they can see all my calendars, but if I just share the calendar, they get a "no access" error.
Here's where I'm setting the shared calendar permissions. I've tried setting them as Reviewer, setting the Default as Reviewer, and setting them as Owner.
Because it works fine in Outlook, I'm wondering if it's an iCal problem. For cross-referencing purposes, here's my issue at Office 365's community: Shared calendars not showing up in Apple iCal
OS X Mountain Lion (10.8.2)