Replication Error - Trying to Interate Users

[Antonino Sidoti]

HI, My first post to this list; I am trying to configure replication between two host, both hosts are having the same errors. Using ‘dovecot log errors’ gives the following errors; Dec 11 18:05:12 Error: auth: Trying to iterate users, but userdbs don't support it (created 0 msecs ago, handshake 0 msecs ago) Dec 11 18:05:12 Error: replicator: User listing returned failure Dec 11 18:05:12 Error: replicator: listing users failed, can't replicate existing data My version of Dovecot version = 2.2.36 My Configuration is attached.

# 2.2.36 (1f10bfa63): /etc/dovecot/dovecot.conf
# OS: OpenBSD 6.4 amd64  
# Hostname: obsd-mail1.sidoti.local
doveadm_password =  # hidden, use -P to show it
doveadm_port = 2727
hostname = mail.sidoti.id.au
listen = *
mail_location = maildir:~/Maildir
mail_plugins = " notify replication"
namespace inbox {
  inbox = yes
  location = 
  mailbox "Deleted Messages" {
    special_use = \Trash
  }
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix = 
}
passdb {
  args = scheme=BLF-CRYPT /etc/mail/passwd
  driver = passwd-file
}
plugin {
  mail_replica = tcp:207.148.115.175:2727
}
protocols = imap lmtp
service aggregator {
  fifo_listener replication-notify-fifo {
    user = vmail
  }
  unix_listener replication-notify {
    user = vmail
  }
}
service doveadm {
  inet_listener {
    port = 2727
  }
}
service imap-login {
  inet_listener imap {
    port = 0
  }
  inet_listener imaps {
    port = 993
    ssl = yes
  }
}
service replicator {
  process_min_avail = 1
  unix_listener replicator-doveadm {
    mode = 0600
  }
}
ssl = required
ssl_cert = </etc/ssl/sidoti.id.au.fullchain.pem
ssl_key =  # hidden, use -P to show it
userdb {
  args = uid=vmail gid=vmail home=/var/vmail/%d/%n
  driver = static
}

Any help is greatly appreciated. Thanks