How could we reach our goal to archive mails from a shared folder of a user?

there is a user, called info. If a mail goes to info, a rule move the mail to a folder (cabinet), which is shared. So other users (who have that shared folder) will see a new mail in the shared folder. I want to clean up this info mailbox, and move old mails to the archive location. But it seems that the cleanup process not getting mails from the cabinet folder. Also I cannot put manually a mail from the shared folder to archive, as I don`t have that menu entry if I select a mail.

I cna imagine that archiving is working for mails, appointments, etc, but not for shared folder. In this case and tip is greatly welcome.