With the idmdap_ad plugin the "winbind normalize names" parameter do not work anymore. until 3.4 a name was mapped to the uid attribute. in 3.5.x this do not work. Behavior until 3.4.x: [root@filer ~]# wbinfo -i 'AD\Guinea.Pig' Guinea.Pig:*:10007:10000::/home/g/Guinea.Pig:/bin/bash [root@filer ~]# Behavior in 3.5.x: [root@filer-lskr samba]# wbinfo -i 'AD\Guinea.Pig' AD\guinea.pig:*:10007:10000:Guinea Pig:/home/g/Guinea.Pig:/bin/bash [root@filer-lskr samba]# This is bad, as this will break definitly our NFS4 idmap Mappings.