Thank you for confirming you are on the latest.   Check the online help guide. Should be a question mark icon in the GUI.   Check in this section Operating the library using the GUI > Access > LDAP Authentication detailed steps.   One call out check the Attribute Mapping section:  For most Windows Active Directory environments, the Username field under Attribute Mapping should bet set to sAMAccountName.  
[IMAGE][IMAGE] Hi ... as per mentioned in the title, I need abit of help setting up the LDAP configurations for the ML3 tape library. I think I have got most of it right except maybe the Attribute Mapping section where i'm kinda lost as to what to fill and the format to fill it. I've tried quite a few formats to which returned the same error result seen above.
ML3 Tape LDAP Configuration Guide