Using ADLDAP plugin in Craft 2.6 - can't bind to LDAP
In more testing, I was able to eliminate the "Can't bind to LDAP server!" error message from Craft by removing both: Account Suffix and Admin Account Suffix settings from the ADLDAP parameter control panel.
In my particular setup, I left all parameters empty in the 'optional' section of the parameter control panel, with the exception of the port ('389') and 'Follow Referrals.'