One of my users came to me with an issue regarding his Outlook for Mac Client. He said he was able to see a persons calendar but when he opened them up they were blank.
Most of our users are using Outlook 2013 on either Windows 7/8/10 and are not having this issue. After about an hour of searching online and digging through message boards I discovered that someone has suggested changing the permissions that the user is granting to Full Details. The default setting is Availability only.
Although this is not something I discovered on my own I figured I would share it anyway as it may help someone down the line.