Is there some type of undocumented file size limit when using this method to save to a UNC path?
http://msdn.microsoft.com/en-us/library/microsoft.office.interop.outlook._mailitem.saveas.aspx
I made an Outlook add-on that copies the currently selected email(s) to a network server. Works great until you try to save an email that has many attachments that total ~10mb. It works fine with an email that has a single attachment that is the same size.