I get a Sharing Error in E3 when I accept the Calendar sharing invitation from Outlook.
Sharing Error:
Sorry, this invitation isn't valid anymore. The sender may have taken away your permission, or you may have already declined this invitation. If you'd like to see this calendar, ask its owner to share it with you again.
On the flip side... when I share my E3 Calendar with Outlook the apps don't communicate and I get a link to instructions that don't match the version of outlook I have??