Hello Janos!
At the moment i am trying to configure my mailpiler docker solution to use SSO. I am using your instruction on https://www.mailpiler.org/wiki/current:single-sign-on, but I am not sure if this will work for the docker solution. My server contains of 3 dockers (piler, mysql, memcached). The piler docker runs the nginx webserver, the piler (version 1.4.4) and manticore. Samba and winbind is not installed. My best guest is, that i have to install samba and winbind in the piler docker instead of installing it on the host. Am I right? - Patrick