Michale,
It would helpful if you could provide us an account to test with in your ticket. The issue is related is something specific to your data and we need to trace every byte going to and from SmarterMail and Outlook to understand the issue. There is no widespread issue with MAPI and each of the issues are specific use cases requiring deep analysis.
Tim Uzzanti
CEO
SmarterTools Inc.
www.smartertools.com