Batch print of .msg file with attachement

Hi all,

I have tons of emails saved as .msg files. Each message contains attachements (microsoft office format)

Now I have to convert each of them to PDF : the memo and all attachements.
One PDF file per .msg file.

This works fine interactively with GUI.

But I would like to do it with command line, in order batch print all my .msg files.
I have created a new PDF printer, with a non interactive profile; but it doesn't work.
I am not able to print the memo and the attachment; I only have either the memo or either one (and only one) of the attachments.

Do you think is it possible? and if so, do you have any idea how I can do ?
Best regards,