XenMobile Domain users unable to authenticate - LDAP response read timed out, timeout used

If domain users or admins are failing to authenticate to XenMobile, verify if the following error appears in the debug log 2016-04-05T10:25:50.128+0000 | 5EAF1FBBC192FC0D | WARN | http-nio-10080-exec-77 | com.sparus.nps.apple.security.AuthUtils | Forcing LDAP auth: cannot refresh user data:...