LDAP Configuration issue inside container

Please halp, there’re my logs.

 : attempting a read lock on slot: 77
:[login=me] [service=imap] [realm=]: not found, update pending
: attempting to release lock on slot: 77
: acquired accept lock
 Authentication failed for me: Bind to ldap server failed (invalid user/password or insufficient access) (-7)
                 : auth failure: [user=me] [service=imap] [realm=] [mech=ldap] [reason=Unknown]
                 : response: NO

Updated config:

ldap_servers: ldap://subdomain.domain.top-level-domain:389
ldap_mech: PLAIN
ldap_search_base: OU=my-ou,DC=subdomain,DC=domain,DC=top-level-domain
ldap_filter: (sAMAccountName=%u)
ldap_bind_dn: CN=ldap-admin-user,OU=my-ou,DC=subdomain,DC=domain,DC=top-level-domain
ldap_password: "my password"
ldap_debug: -1

/etc/default/saslauthd

MECHANISMS="ldap"
START=yes
DESC="SASL Authentication Daemon"
NAME="saslauthd"
MECH_OPTIONS=""
THREADS=5
OPTIONS="-c -V -m /var/run/saslauthd -O /etc/saslauthd.conf"

I have built image of OpenLDAP server in container and this one works perfectly, unfortunately I need LDAP directly from AD to be working as well