Hallo Im trying to set up an Postfix and Dovecot mailserver with ActiveDirectory interation. Postfix is doing well and even Dovecot does ... but I have one big problem! My AD Accounts ar stored in two Subfolders ou=Bischoff Benutzer LTT, dc=bischoff-ltt, dc=local ou=Bischoff Benutzer Nbg, dc=bischoff-ltt, dc=local If i use "base = ou=Bischoff Benutzer LTT, dc=bischoff-ltt, dc=local" everything is fine but users from "ou=Bischoff Benutzer Nbg" will not work. Thats ok so far. But when i use "base = dc=bischoff-ltt, dc=local" none user will be found even if i use "scope = subtree". Postfix has no problem with the base set to "dc=bischoff-ltt, dc=local". Ldapsearch has no problem too. I use Version 2.1.12 on Gentoo Linux with a 2003R2 AD Is scope=subtree broken in Dovecot? Must I set some special parameters for Windows AD? My Config: hosts = 192.168.1.98 dn = bischoff-ltt\ldapsearch dnpass = xxxxx auth_bind = yes ldap_version = 3 scope = subtree base = dc=bischoff-ltt, dc=local #base = ou=Bischoff Benutzer LTT, dc=bischoff-ltt, dc=local #base = ou=Bischoff Benutzer Nbg, dc=bischoff-ltt, dc=local user_attrs = =home=/var/dovecot/%Ln/,=mail=maildir:/var/dovecot/%Ln/ user_filter = (&(ObjectClass=person)(sAMAccountName=%u)) pass_filter = (&(ObjectClass=person)(sAMAccountName=%u)) Thanks for Help Marcus