Hi Mihail,
A step-by-step configuration is loosely described here:
http://www.ibm.com/developerworks/lotus/library/notes-mobile-connect/index.html
and here:
http://www-10.lotus.com/ldd/lmcwiki.nsf/dx/Implementing_Microsoft_Windows%E2%80%99_Graphical_Identification_and_Authentication_%28GINA%29_with_IBM_Lotus_Mobile_Connect_6.x_
Can you provide a few more details of how it is not working? If LDAP server A goes down, is LMC not able to switch to the backup on LDAP server B? Please advise, or, welcome to open a PMR with IBM Support.
Let me know if you have any additional questions. Thanks.
Travis Cornwell
IBM L2 Support, Lotus Mobile Connect