I am working in a native window 2003 domain with Exchange 2003 SP2 servers. I am able to send invites to non-domain mailboxes; however, when I try to send a cancellation the message gets stuck in the local server queue. I tried sending a cancellation using OWA and Outlook 2003/2007 client, but I get the same issue.
I did find out what could be causing the problem, but it just does not make any sense as to why it is happening. Below are the steps I perform to identify why the message get stuck in the local queue.
1. Create an invite using Outlook client
2. Recipient receives invite and accepts invitation
3. Sender opens email that states receiver accepts invite
4. Sender then opens calendar entry in OWA. OWA states "The website cannot display the page". I do not get any errors when viewing the email in Outlook.
5. Send the invite and it get stuck in queue.
Part 4 gives me a clue that there is a problem with the calendar entry. There are two workarounds I can use to temporarily fix the problem.
1. I create another invite to the recipient. The recipient accepts the invitation. I receive the confirmation; however, I do not open the confirmation email located in the Inbox. I go directly to the calendar entry and perform a cancellation. The cancellation is successful.
2. I edit the calendar entry and change the date. The changes are then sent to the recipient. A cancellation invite is then sent and that is successful. I tried changing only the time and that still results in a unsuccessful delivery.
I found a MS hotfix, but it relates to Exchange 2003 calendar invites to 2007 mailboxes http://support.microsoft.com/kb/938650, so I'm not sure if that is the right route to take.
I have a Corporate Blackberry Exchange server, so I used my BB device to book and cancel an invitation. The Blackberry service was able to perform the calendaring operation without any