As workaround there is 2 options for this issue:
1. Confirm that SDM has the "Number of LDAP agents" installed in SDM by login with an administrator account then
a) going to Administrator tab
b) go to 'Option Manager' >>LDAP
c) Click on 'num_ldap_agents' and EDIT
d) enter option Value '2' and install this option.
e) restart SDM Services.
2. Contact the LDAP Administrator to reset the user password in AD, then users should be able to login without problems.