[SSSD-users] sssd + password

Hello List, CentOS 7.4 sssd 1.15.2-50 I have a Problem with sssd and Pam for the Mailserver config? I like to rsync two dovecot server but this is not working the user can't authenticate himself ? In my old config I make this with freeipa -ldap direct, but I don't like a extra user for this. I read and read so much things about sssd, I mean this Problem "must" be working with sssd? I have installed a plugin for FreeIPA for the mailserver to have mailatrenateaddress for my user but I mean I can only correct read all this things with a ldap connect? When any have a better idee please tell me ? Thanks for a answer, -- mit freundlichen Grüssen / best regards, Günther J. Niederwimmer