Shared Mailboxes with Dovecot

[flex1]

Today i migrated from courier to dovecot. The migration was successfully, no problems occurred. Now I'm interested in shared mailboxes to share one mailbox between several imap-accounts. Is it possible to configure these shared mailboxes (feature of Dovecot and one reason for me to migrate to dovecot) via Plesk-GUI or alternatively via Command line?

Thank you very much for your support!

 

[chainovate]

as this pops up quite often in online searches:

Something new here?

As the "Premium Mail Plugin" by Kolab isn't working (and probably heavy outdated) with shared inboxes in shared folders, the question is: what are alternatives?
Managing those via cli config for dovecot itself? Uff...

Does anybody have an idea?
Cheers