Существует несколько опций рассмотреть:
Okay, after much investigation I have turned on error info using ldap_errno()
and ldap_error()
and found it bringing back the error 'Strong(er) authentication required' have discovered two possible solutions;
Adjust Group Policy Settings
No signing requirements (Domain Controller: LDAP server signing requirements)
Result: Managed to bind successfully and when I enter the username or password incorrectly and it throws an 'Invalid credentials' as expected.
Enable LDAP over SSL (LDAPS)