You can't. See Apple's iPhone forum for Mail, Calendar and Contact issues at
http://discussions.apple.com/forum.jspa?forumID=1144 to find out how to make
mobileme use your default calendar.

--
Diane Poremsky [MVP - Outlook]
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Do you sync your mailbox with a smartphone or pda?
http://forums.slipstick.com/showthread.php?t=39473



"Joe" wrote in message
...
When using mobileme and outlook, outlook insists on keeping their default
calender, so I have 2 calenders listed in outlook calander. How do I
delete
the default outlook calender, or merge them so only 1 calender shows?