Well yes you can ? Myself test this with SAMBA Domain Controller. My Clients windows and connect with Samba Server. So i add another windows 2003 machine and install joined like domain member. Now in DLP you find this machine and this machine will fatch your samba users.
do you have a link to documentation on how to integrate a win 2003 BDC into a samba domain ?
How about the licenses. Does a machine that uses the win2003 BDC as logon server a CAL ?
We don't have any document for that. but we used this setup for many years starting with Windows NT / Integration with Unix 2.2 Services. Recently our team done this with LDAP+SAMBA with Windows Clients. using LDAP Bridge Drive we used windows 2003 machine as backup domain controller. We have mix setup windows/linux clients for windows clients you need CAL licenses . I understand your point