Specifies the type of item that is exported

ID: ExportModeType

Attachments only

Only the item's attachments are exported

ID: ExportModeType.attachmentsonly

Main item

The main item is exported without attachments

ID: ExportModeType.maindoconly

Export separately

The main item and its attachments are exported separately

ID: ExportModeType.split

Include attachments

The attachments are archived in addition to the item

ID: ExportModeType.splitattachments

Whole

The item is exported as it exists in the mailbox

ID: ExportModeType.whole