Outlook 2007 user has blank calendar when opening share calendar of outlook 2010 user. If we use OWA 2010 or Outlook 2010 user has no issue opening the 2010 shared calendar with Free/Busy Details setting and can see appointments as Free/Busy. Also if we set the permissions level to reviewer outlook 2007 user can view outlook 2010 calendar just fine.
When permissions is set to Free/Busy only, the following error comes up after a few minutes: "You do not have sufficient permission to preform this operation on this object. See the folder Contact or your system administrator."
Is there a setting on Exchange to set the correct permission, or can all this still be something local to outlook?