From: otrs-bounces@otrs.org On Behalf Of Raul Libório
Sent: Thursday, October 09, 2014 5:12 PM
Subject: [otrs] Authentication failed for customers - Windows 2012 R2 AD LDAP

I have an Active Directory installed on Windows Server 2012 R2. The OTRS can view all users, however, when I try to authenticate, displays error like username or password is incorrect. 

Does anyone have any tips on how to solve? 

Not sure if this is on point but I seem to recall there are security settings w/i AD LDAP which will return all authenication requests as failed by default (no certain about this statement it was a while ago!?). I do remember retreiving the denial code and which provided a more specific error and then just followed the bouncing ball. It was a "well known" microsoft issue.

gl,