dbox alternate storage and samba

Hello everyone, i was just wondering if it's possible to use a samba share as an alternate storage for dbox format.

I tried creating a samba share, but when i try to move the email to the alternate storage using doveadm altmove, no errors are printed but no mails are moved.

Everything works if the alternate storage is simply another directory on the server hard drive.

am i mssing something?

thanks in advance.