Inherited a domain that is still running Exchange 2003 with lots of Public Folders and Calendars. I have a problem with deleting items from the calendars stored in these public folders. None of my users can delete any items from Calendars, regardless if these are old entries or if they add a new entry. Each time we try to delete the entries we get this error: "Some items cannot be deleted. They were either moved or already deleted, or access was denied." I have googled this error and nothing out there has helped me to resolve this issue. I also read the 'related topics' that MS provided and the answer is not there. I am desperate to get this fixed and am lost. Environment: Running two exchange 2003 servers. Clients are using Outlook 2007 clients. We have tried to delete the items using OWA and still get the same result.

You can Use PFDAV Admin tool to remove the unwanted Calendar entries in Public folder Also, Try to create a New calendar for the same and start using that only and export the content from the old calendar and import it here

You can Use PFDAV Admin tool to remove the unwanted Calendar entries in Public folder Also, Try to create a New calendar for the same and start using that only and export the content from the old calendar and import it here