Env: AIX 5.2 ML07 with Samba 3.0.21b (compiled in-house) with config options of: --with-pam --with-winbind --with-acl-support --with-aio-support Can anybody shed any light on why users that have 8 characters or less (Windows and AIX) and are defined in /etc/passwd can access the defined Samba share while those users with a Windows username of 9 characters or more (who have been defined in the "username map" file are always presented with an authentication window? Is there something that I have wrong that I am just not seeing? This Samba server is functioning as a member server in an existing Windows NT domain. smb.conf reads: [global] workgroup = ERSSECURITY netbios name = SAMBASRVR server string = Samba security = DOMAIN algorithmic rid base = 500000 username map = /usr/local/samba/lib/nt_dom_2_unix_user_map ldap ssl = no idmap uid = 10001-30000 idmap gid = 10001-30000 winbind separator = + [denali_d] path = /samba/denali_d read only = No # guest ok = Yes The file noted in "username map" reads: brad=ERSSECURITY/bstafford mrutherf=ERSSECURITY/mrutherford sambat2=ERSSECURITY/sambatest sambat2=sambatest /etc/pam.conf reads: # Authentication # login auth required /usr/lib/security/pam_winbind.so login auth required /usr/lib/security/pam_aix try_first_pass # login auth required /usr/lib/security/pam_aix # login auth required /usr/lib/security/pam_winbind.so try_first_pass su auth sufficient /usr/lib/security/pam_aix OTHER auth required /usr/lib/security/pam_aix # # Account Mgmt # # login account required /usr/lib/security/pam_aix login account sufficient /usr/lib/security/pam_winbind.so try_first_pass OTHER account required /usr/lib/security/pam_aix # # Session Mgmt # OTHER session required /usr/lib/security/pam_aix # # Password Mgmt # OTHER password required /usr/lib/security/pam_aix