Is delegation of a calendar possible on using Office 365 and any client whatsoever on Mac? I am looking for any way for OS X users to use Office 365's exchange calendaring service to delegate / share a calendar with another user on Office 365.

I have researched the MS knowledge base which states that for delegation, you need both an Exchange server (which I presume Office 365 is) and either Outlook 2010 or 2013 - neither of which run on OS X. If I have to, I could get to these software to temporarily sign in and set up the delegation, but I don't want to run Windows day in and day out and need a native OS X solution.

Short of running Windows virtually day to day, can OS X users use delegation features of Office 365?
Delegate access is available in Outlook 2011 but not in Outlook Web App, nor in Apple's Mail client.

Here are the instructions:

How to set up 365 with Mac and Exchange server.