Hi All, I've got code that exports Outlook items to .MSG files that has worked in all Outlook versions up to Outlook 2007. Unfortunately, this same code is producing corrupt MSG files in Outlook 2010. Note that this code is based on the same code from the Microsoft KB article "Save Message to MSG Compound File" here: http://support.microsoft.com/kb/171907 The .MSG files exported by our application are about half the size of the .MSG files that are exported by Outlook itself. When I double click them on the file system, while Outlook is running I get an error dialog from Outlook saying "The operation failed". When I try to open the MSG while Outlook is not running, I get an error dialog "Cannot start Microsoft Outlook". Has anyone else noticed this behavior? Are there any changes to MAPI in Outlook 2010 that I am missing? Thanks in advance, -Stuart