Hello All; I have a small, isolated, network consisting of a W2K3 (sp2) domain controller and about 20 client PCs which dual-boot between Win XP Pro and Fedora 6. I am attempting to configure Samba (3.0.24), which runs only on the client machines when Fedora is booted, for single log-on and roaming profiles. MS Services for Unix (SFU) v3.5 is installed on the W2K3 domain controller, so I would like to use that to manage user/group IDs. I have been able to join the AD domain and validate logins of domain users, but have been unable to configure a working backend that pulls UID/GIDs directly from the W2K3 server via 'idmap backend=ad'. I've been through the Official Samba How-To & Reference documents as well as O'Reilly's Using Samba (3rd Ed), the Samba WIKI, and the usual Google searches. Questions: 1. Does anyone know for sure if the Samba RPM built for Fedora 6 (samba-3.0.24-3) was built with the idmap_ad library (compiled with '--with-shared-modules=idmap_ad')? The results of 'smbd -b' are a bit ambiguous to me, but it does list 'idmap_ad_init' as a 'Build Option' (but makes no mention of 'idmap_ad' in the 'Builtin modules'). 2. Can anybody offer any hints or point me to a reference or how-to that may help me complete this configuration? Thanks!!! --Jeff smb.conf: [global] workgroup = TestGroup realm = TESTGROUP security = ADS username map = /etc/samba/smbusers log level = 3 syslog = 0 log file = /var/log/samba/%m max log size = 50 ldap ssl = no idmap uid = 1000-33554432 idmap gid = 1000-33554432 template shell = /bin/bash winbind use default domain winbind separator = +