My office uses Outlook 2011 for Mac, with Kerio Connect as the mailserver. 

We all share our calendars with domain users as "Reviewers".

Up until recently, we could see when someone had a Private Event booked, but now those are missing from the delegate view so it appears as if people are available when they are not. 

We can still view the Private Events in webmail (Kerio), just not in desktop Outlook 2011 for Mac. 

Please help!