can you turn on mail_debug=yes and run doveadm -Dv mailbox delete and provide output and logs from both servers?
-------- Original message --------
From: Ralf Becker <rb@egroupware.org>
Date: 14/08/2018 16:13 (GMT+02:00)
To: dovecot@dovecot.org
Subject: doveadm mailbox delete not working
I have a user who has several folders in his mailbox, which we can not