Recieving an error message in iCal that says “HTTP/1.1 403 Forbidden” to operation CalDAVAccountRefreshQueueableOperation.”?
MadisonP suggests:
Welcome to Apple Discussions, Kristi.
It sounds like iCal is trying access a shared calendar on a server and is unable to.
Go to iCal >Preferences > Accounts.
__Have you added anything here?
__By default this column is blank.
__If there is anything here, try deleting it and then close and reopen iCalIf that does not resolve the issue:
First make a backup, File > Export > Archive.
Go to Apple Menu > System Preferences > MobileMe > Account >Sign Out
Remove the following to the trash and restart your computer:
Home > Library > Caches
Home > Library > Calendars > Calendar Cache, Cache, Cache 1, 2, 3, etc. (Do not remove Sync Cache or Theme Cache)
Home > Library > Preferences > com.apple.ical (There may be more than one of these. Remove them all.)
__NOTE: Removing these files will remove any shared (CalDAV) calendars you may have access to. You will have to re-add those calendars to iCal > Preferences > Accounts.Launch iCal and test. If it works fine then Go to Apple Menu > System Preferences > MobileMe > Account >Sign In.
Hope that helps.
via Apple – Support – Discussions – Recieving an error message ….

So does that mean that you cannot share your ICal with different people? Because we are sharing our Ical with about 25 people. I was reading your post it and it is saying that you have to delete anything that is in there. then close it and reopen it?
Just asking?
I haven’t had experience with this. Sorry. A product called busy cal seems to avoid these kind of issues.