Active Directory Home folders problems

Hello to all of you We have an AD domain (SBS 2003) and several Macintosh Tiger clients. So far, I had some success binding to AD with the Directory Access. The problems: a. Nothing is mounted on Desktop. Only a home folder created in Users. So, I suppose this is not a Network Home folder. It is saved locally on the client machine. b. Suppose something is mounted on desktop. Is this the users home folder? How the local home and the network home are syncing? c. When a user changes password, cannot login. Suppose there is some cached info somewhere. Where and what can I do? Thanks in advance Kostas