Hi, Today i tried to update samba and winbindd with the debs from samba.org from 3.0.14 to 3.0.20. Most things worked out of the box, but uid <-> sid conversion was broken after the update. Heres a summary of our setup: Samba member server joined to a win2k3 domain with the following smb.conf entries: [global] ## Browsing/Identification ### # Change this to the workgroup/NT-domain name your Samba server will # part of workgroup = CIP-POOL winbind trusted domains only = yes allow trusted domains = no winbind use default domain = yes security = ADS realm = WIWI.UNI-KARLSRUHE.DE restrict anonymous = 2 map to guest = Bad Uid all domain users avaible locally on the samba server with nss_ldap, i.e "getent passwd christophk" returns christophk:x:2006:2000:Christoph Klein:/home/Admins/christophk:/bin/bash resoltion from usernames to sids work too, "wbinfo -n christophk" returns: S-1-5-21-1475544817-17105652-1213672966-12910 User (1) But "wbinfo -S S-1-5-21-1475544817-17105652-1213672966-12910" returns Could not convert sid S-1-5-21-1475544817-17105652-1213672966-12910 to uid quite similar to "wbinfo -U2006": Could not convert uid 2006 to sid Winbindd versions prior to 3.0.20 were able to map uids and sids out of the box if the usernames for the unix and the windows account were the same. Was there any change in here or did i miss something in my setup. I couldnt find any hint in the release notes. Do i have to use idmap_sfu ?! Thanks christophk