We have a few mailboxes that are used for their calendars only so that staff on the road can update their whereabouts. This worked fine in Exchange 2007, but once I moved this mailbox to 2013, it stopped working. People can connect to the calendar, but it doesn't show any of the entries, except for a few recurring appointments.
At first I thought it had to do with the ActiveSync settings, so I changed it from the default of 10 users to 50 users via new-throttlingpolicy, but that didn't seem to work. (Granted, I didn't get a chance to restart IIS or such, so maybe all that's needed is that?)
Perhaps it's some other setting that needs to be changed?
I guess ultimately I should set this up differently as well (public folders?), so I"m open to suggestions here, assuming I can easily move over what's already in place.