Thanks for the replies.
I'll try to clarify my problem. I can access a share on windows servers with the smd://ip-address. I'm running 10.3.
What I want is, I wondered if it would be possible to use the AD for user verifications, so that ex. Domain Users in AD have logon rights to OS X, so user can just use their windows account to log on to OS X. I've tried to configure the directory connection in OS X to the windows AD, and that seems to work. But that still won't allow me to use windows account, when loggin on to OS X. It's still only let's me choose local accounts.
Hope you can help.
/Max