Customers running Office Communicator 2007 + Office 2007:
This issue is fixed by applying the hotfix referenced in KB 961752 (http://support.microsoft.com/kb/961752), and although the KB article does not specifcally call out this issue, we are working on both creating a new KB to address this, as well posting this blog entry to increase its visibility.
Customers running Office Communicator 2007 + Office 2003:
Our Office Development Team is moving forward with creating corresponding official hotfix for Office 2003. Although it’s a bit early to discuss timeframes in terms of when you can expect the public hotfix, we have a private copy of the fixed MSMAPI32.DLL. If you would like to test this build, please engage Microsoft Customer Support Services via http://support.microsoft.com. Premier customers: please leverage your Technical Account Manager to initiate the case creation process.