MhtSaveOptions preserve TNEF

Hello
MhtSaveOptions.SaveAllHeaders = True
MhtSaveOptions.SaveAttachments = True
MhtSaveOptions.SkipInlineImages = False
MhtSaveOptions.MhtFormatOptions = MhtFormatOptions.WriteOutlineAttachments
Still loosing TNEF attachments, how do you think about:

MhtSaveOptions.FileCompatibilityMode = FileCompatibilityMode.PreserveTnefAttachments

??? Thank you :slight_smile:

@australian.dev.nerds,

will not work, because mht viewers cannot handle tnef.