KUbuntu 16.04 - Leave Windows ADS without ADScontroller

Hello,

i would like to leave an Kubuntu 16.04 from an ADS without an existing ADScontroller. I've done this with "net ads leave" and also with "force". But this is not working without ADS.
So what i have to do with the OS?

Why i would like to do that? The Kubuntu should be an template for future installations. System with LDAP or ADS/Kerberos. So in this state (winbind is not anymore in nsswtich.conf) i at login i must waiting a long time.

So what must i execute or delte do leave the ADS, that i'am able to use the OS as tempalte for all my things.

Thanks a lot
Best Regards