cannot connect using LDP.exe to DC on 636 SSL LDAPS

i have 3 server 2012 r2 domain controllers

i cannot connect of them ldp.exe port 636 ssl

i running tool on dcs , following:

ld = ldap_sslinit("my,domain.com", 636, 1);

error 0 = ldap_set_option(hldap, ldap_opt_protocol_version, 3);

error 81 = ldap_connect(hldap, null);

server error: <empty>

error <0x51>: fail connect my.domain.com.

ld = ldap_sslinit("dc01.my,domain.com", 636, 1);

error 81 = ldap_set_option(hldap, ldap_opt_protocol_version, 3);

error 81 = ldap_connect(hldap, null);

server error: <empty>

error <0x51>: fail connect dc01.my.domain.com.

i have come across reg hack says add dword hklm/currentcontrolset/control/services/ldap of usehostnameasalias , value other 0.   doesn't resolve issue me.

each domain controller has received cert forest level ca, still have issue.

please advise

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# when wrote script god , knew doing. # now, god knows!

hi wasisname, have verified successful tcp connectivity machine, perhaps time try tool access dc.  try access 1 of them domain-joined workstation.  download ldap admin 1.6.1, , make connection dc using tool instead.  ldp.exe isn't user-friendly.

http://www.ldapadmin.org/download/ldapadmin.html

Windows Server  >  Directory Services