Netbox not trying to contact AD LDAP server

[jbcreek]

I am trying to set up Netbox to use LDAP to Active Directory. It is not working. I do not see any network traffic being initiated by the Netbox server to the Active Directory server. How can I fix this?

RHEL 9
Python 3.11
NetBox Community v4.1.11

REMOTE_AUTH_BACKEND = 'netbox.authentication.LDAPBackend' is set in configuration.py

ldap_config.py

import ldap
from django_auth_ldap.config import LDAPSearch, GroupOfNamesType
from django_auth_ldap.backend import LDAPBackend

AUTH_LDAP_SERVER_URI = "ldaps://ftwin1-ds1.ds.indigital.net"

AUTH_LDAP_CONNECTION_OPTIONS = {
ldap.OPT_REFERRALS: 0
}

AUTH_LDAP_BIND_DN = "CN=Netbox Service,OU=services,DC=ds,DC=indigital,DC=net"
AUTH_LDAP_BIND_PASSWORD = "password"

LDAP_IGNORE_CERT_ERRORS = True

LDAP_CA_CERT_FILE = '/etc/ssl/certs/ADCA-Cert2.cer'

AUTH_LDAP_USER_SEARCH = LDAPSearch("DC=ds,DC=indigital,DC=net",ldap.SCOPE_SUBTREE,"(sAMAccountName=%(user)s)")

AUTH_LDAP_USER_DN_TEMPLATE = None

AUTH_LDAP_USER_ATTR_MAP = {
"first_name": "givenName",
"last_name": "sn",
"email": "mail"
}

AUTH_LDAP_GROUP_SEARCH = LDAPSearch("dc=ds,dc=indigital,dc=net", ldap.SCOPE_SUBTREE,
"(objectClass=group)")
AUTH_LDAP_GROUP_TYPE = GroupOfNamesType()
AUTH_LDAP_GROUP_SEARCH = LDAPSearch("dc=ds,dc=indigital,dc=net", ldap.SCOPE_SUBTREE,
"(objectClass=group)")

AUTH_LDAP_REQUIRE_GROUP = "cn=netbox_users,cn=Users,dc=ds,dc=indigital,DC=net"

AUTH_LDAP_MIRROR_GROUPS = True

AUTH_LDAP_USER_FLAGS_BY_GROUP = {
"is_active": "cn=netbox_users,cn=Users,dc=ds,dc=indigital,DC=net",
"is_staff": "cn=netbox_staff,cn=Users,dc=ds,dc=indigital,DC=net",
"is_superuser": "cn=netbox_superuser,cn=Users,dc=ds,dc=indigital,DC=net"
}

AUTH_LDAP_FIND_GROUP_PERMS = True
AUTH_LDAP_CACHE_TIMEOUT = 3600

/opt/netbox/local/logs/django-ldap-debug.log
Authentication failed for jcreek: failed to map the username to a DN.

[jbcreek]

Converted /etc/ssl/certs/ADCA-Cert2.cer to /etc/ssl/certs/ADCA-Cert2.pem

In the ldap_conf.py file:
Commented out LDAP_IGNORE_CERT_ERRORS = True
and changed LDAP_CA_CERT_FILE = '/etc/ssl/certs/ADCA-Cert2.cer' to LDAP_CA_CERT_FILE = '/etc/ssl/certs/ADCA-Cert2.pem'

Authentication works now.