Hi Zhang,

I'm using SOGO as groupware and add-ons Imap-ACL-Extension for Thunderbird ESR 10.

As far as the SOGO in Thunderbird can enable sharing, but could not that just a folder to appear when all share INBOX folders appear but without access to the User

Look my conf dovecot

# Listen addresses.
#   - '*' means all available IPv4 addresses.
#   - '[::]' means all available IPv6 addresses.
# Use below setting to listen on all available addresses:
#listen = *, [::]
listen = *

#base_dir = /var/run/dovecot

# Enabled mail protocols.
protocols = pop3 imap sieve

# User/group who owns the message files:
mail_uid = 500
mail_gid = 500

# Assign uid to virtual users.
first_valid_uid = 500
last_valid_uid = 500

# Logging. Reference: http://wiki2.dovecot.org/Logging
log_path = /var/log/dovecot.log
mail_debug = no
auth_verbose = yes
auth_debug = yes
auth_debug_passwords = no
# Possible values: no, plain, sha1.
auth_verbose_passwords = no

# SSL: Global settings.
# Refer to wiki site for per protocol, ip, server name SSL settings:
# http://wiki2.dovecot.org/SSL/DovecotConfiguration
ssl = required
verbose_ssl = no
ssl_cert = </etc/pki/tls/certs/iRedMail_CA.pem
ssl_key = </etc/pki/tls/private/iRedMail.key

# With disable_plaintext_auth=yes AND ssl=required, STARTTLS is mandatory.
# Set disable_plaintext_auth=no AND ssl=yes to allow plain password transmitted
# insecurely.
disable_plaintext_auth = yes
# Allow plain text password per IP address/net
#remote 192.168.0.0/24 {
#   disable_plaintext_auth = no
#}

# Mail location and mailbox format.
mail_location = maildir:/%Lh/Maildir/:INDEX=/%Lh/Maildir/

# Authentication related settings.
# Append this domain name if client gives empty realm.
auth_default_realm =

# Authentication mechanisms.
auth_mechanisms = PLAIN LOGIN

service auth {
    unix_listener /var/spool/postfix/dovecot-auth {
        user = postfix
        group = postfix
        mode = 0666
    }
    unix_listener auth-master {
        user = vmail
        group = vmail
        mode = 0666
    }
    unix_listener auth-userdb {
        user = vmail
        group = vmail
        mode = 0660
    }
}

# Virtual mail accounts.

userdb {
    args = /etc/dovecot/dovecot-ldap.conf
    driver = ldap
}
passdb {
    args = /etc/dovecot/dovecot-ldap.conf
    driver = ldap
}

plugin {
    auth_socket_path = /var/run/dovecot/auth-master

    quota = dict:user::proxy::quotadict
    quota_rule = *:storage=1G
    #quota_rule2 = *:messages=0
    #quota_rule3 = Trash:storage=1G
    #quota_rule4 = Junk:ignore

    # Quota warning.
    # If user suddenly receives a huge mail and the quota jumps from
    # 85% to 95%, only the 95% script is executed.
    quota_warning = storage=85%% quota-warning 85 %u
    quota_warning2 = storage=90%% quota-warning 90 %u
    quota_warning3 = storage=95%% quota-warning 95 %u

    # Plugin: autocreate. Create and subscribe to default IMAP folders.
    autocreate = INBOX
    autocreate2 = Sent
    autocreate3 = Trash
    autocreate4 = Drafts
    autocreate5 = Junk
    autosubscribe = INBOX
    autosubscribe2 = Sent
    autosubscribe3 = Trash
    autosubscribe4 = Drafts
    autosubscribe5 = Junk

    # Plugin: expire.
    expire = Trash 7 Trash/* 7 Junk 30
    expire_dict = proxy::expire

    # ACL and share folder
    acl = vfile
    acl_shared_dict = proxy::acl

    # Pigeonhole managesieve service.
    # Reference: http://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
    # Per-user sieve settings.
    sieve_dir = /%Lh/sieve
    sieve = /%Lh/sieve/dovecot.sieve

    # Global sieve settings.
    sieve_global_dir = /opt/vmail/sieve
    sieve_global_path = /opt/vmail/sieve/dovecot.sieve
    #sieve_before =
    #sieve_after =
}
service managesieve-login {
  inet_listener sieve {
  port = 2000
  }
}

service quota-warning {
    executable = script /usr/local/bin/dovecot-quota-warning.sh
    unix_listener quota-warning {
        user = vmail
        group = vmail
        mode = 0660
    }
}

service dict {
    unix_listener dict {
        mode = 0660
        user = vmail
        group = vmail
    }
}

dict {
    expire = db:/var/lib/dovecot/expire/expire.db
    quotadict = mysql:/etc/dovecot/dovecot-used-quota.conf
    acl = mysql:/etc/dovecot/dovecot-share-folder.conf
}

protocol lda {
    # Reference: http://wiki2.dovecot.org/LDA
    mail_plugins = quota sieve autocreate acl lazy_expunge
    auth_socket_path = /var/run/dovecot/auth-master
    log_path = /var/log/sieve.log
    lda_mailbox_autocreate = yes
    postmaster_address = root
}
protocol imap {
    imap_client_workarounds = tb-extra-mailbox-sep
    mail_plugins = quota imap_quota autocreate acl imap_acl lazy_expunge
}
protocol pop3 {
    mail_plugins = quota
    pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
    pop3_uidl_format = %08Xu%08Xv
}
namespace {
    type = private
    separator = /
    prefix =
    #location defaults to mail_location.
    inbox = yes
}

# namespace for lazy_expunge plugin:
namespace {
  prefix = .EXPUNGED/
  separator = /
  location = maildir:/%Lh/Maildir/expunged:INDEX=/%Lh/Maildir/expunged
  hidden = yes
  list = no
}

  mail_plugins = $mail_plugins lazy_expunge
  plugin {
  lazy_expunge = .EXPUNGED/
  hidden = yes
  list = no
}

namespace {
    type = shared
    separator = /
    prefix = Shared/%%u/
    location = maildir:/%%Lh/Maildir/:INDEX=/%%Lh/Maildir/Shared/%%u
    # this namespace should handle its own subscriptions or not.
    subscriptions = yes
    list = children