Soluzione 1: attivare LDAPS con certificato sul server di dominio.
Soluzione2: Sul controller di dominio andare a modificare la GPO Domain Controller Policy:
Domain controller: LDAP server channel binding token requirements: "When Supported"
Domain controller: LDAP server signing requirements: "None"
Domain controller: LDAP server Enforce signing requirements: "Disabled"
Network security: LDAP client encryption requirements: "Negotiate Sealing"
Network security: LDAP client signing requirements: "Negotiate Signing"
Domain controller: LDAP server signing requirements: "None"
Domain controller: LDAP server Enforce signing requirements: "Disabled"
Network security: LDAP client encryption requirements: "Negotiate Sealing"
Network security: LDAP client signing requirements: "Negotiate Signing"