Without having access to the Exchange server, is there an app I can run on my OS X desktop to sync my Exchange-based calendar to Google Calendar?
I really don't mind if it just duplicates the events from Exchange to Google Cal.
a) The google sync is at Outlook level on desktop and not at Exchange Level. http://support.google.com/calendar/bin/answer.py?hl=en&answer=89960
b) Here's a guide on how to sync Exchange Calendar with iCal. http://mac2.microsoft.com/help/office/14/en-us/outlook/item/748ea995-465e-4c40-88d2-7669c7f37a0d
c) There are various roll-your-own options using Exchange EWS Managed Api on MSDN http://msdn.microsoft.com/en-us/library/exchange/dd633710(v=exchg.80).aspx