Found this on Apples site. It was posted by MCP1212. It worked for me and now I am able to open and edit appointments that sync to my iPhone 3G.
"I was having this problem and found the solution on another post. You are probably having another problem which is related to this. Calendar entries created on your Outlook are not Editable on your iPhone. The fix for both is as follows:
Make sure the spelling and capitalization of your email address in your exchange settings on the iphone matches exactly what is entered in the Active Directory of your Exchange Server.
The email address is case sensitive so althouth your iphone is seemingly syncing with your exchange, sometimes it thinks you are someone else and treats your own calendar entries as meeting invites from a 3rd party. As long as the spelling matches, both problems above should be resolved. "
07-25-2008 01:15 AM