I have a user that has a calendar permission problem. When you try to access
the permisson tab on the calendar permission you receive the error "some
permission could not be displayed, the client operation failed"
When you try to give someone Delegate permission to the account, the
calendar permissions are grayed out as well. This occurs even if you have
someone set as owner of the mailbox through AD users and computers.
The deliver mail to is set to the mailbox and not a personal folder.
Even with an admin account the calendar permission are always grayed out.
We are using Outlook 2003 and Exchange 2003

Any help would be appreciated.