iCal getting Outlook appointments
I have to use Microsoft Outlook at work. It is a seperate account from my iCloud account so there should be no interaction between the two. Yet I have discovered that appointments I receive via Outlook (which is set as the default mail and calendar client) are showing up in iCal (they are not associated with a defined iCal calendar, they are grey and just there). Worse yet, I have discovered that deleting these from iCal deletes them from Outlook. This is not a good thing!! How do I disassociate iCal and Outlook so this no longer happens? And I have checked and the iCal option to "Automatcially retreive CalDAV invitations from Mail" is disabled.
Help!!
Thank you.
MacBook Air, Mac OS X (10.7.2)