Using Active Directory authetication

I have setup a test enviroment and wanted to use

MS Achtive Directory only for authetication of

my users.

This means that all user data should be stored in

the databases as before, but only users defined in

Active directory should be allowed to use the server

with their user/password from Active directory …

Is this possible ?

TIA, Detlef Sommer

Please can anyone help me … Or has someone

get this up and running ?