Is any body already try to achive it? Is it possible?
I had a look at this a while ago. Firstly, you will need Kerberos as AD uses that. Secondly, you need to replace uClibC with glibc. uClibC does not have support for using any other authentication methods apart from the passwd file. You need to modify the /etc/nsswitch.conf file which only exists/will take effect if if you are running glibc. Once I found this out, I stopped bothering as the MB is only on a small network.
Hope this helps