Our small corporation uses Office 365 for email, calendar, etc. 

We set up a shared calendar (using a dummy address) for the corporate calendar with open permissions for everyone to read/write to it.  This has worked great EXCEPT for the one Mac user.  They can see the calendar, but have been unable to write into it, even when it is the only calendar open in Outlook.  Is there a way to force a new appointment in Mac Office 2011 to write to a shared calendar?

Thanks for any help you can provide. 

G Halley