Hi had to work hole day with 120%, so sorry for late answer.
I did yum remove urbackup. In /var/urbackup are databases. I deletet them manually, otherwise urback restores old values. Also did ‘config delete urbackup-server’, ‘config delete urback-udp’ and ‘signal-event firewall-adjust’. After that, new urbackinstallation asked again for backup-folder and admin user and no client were stored anymore. So i think it was a real new installation.
hope on monday will have time. New VM ist allready ready.
@stephdl did the installation on a new VM NS 6.7 final.
repo is now in right folder, but repo name must be changed to [urbackup] manually.
Urbackup found a client without changing fw-rules and did a backup. 
where is the mega-like button ?
Merci Ralf 
next step could be to test urbackup2 on NS7…this a good reason to test the alpha.
No mega like but a bunch of hearts and thumbs up: 
Thank for help. i have same issue in my installation and solve it. 
well my fat fingers have played again, since the urbackup is enabled by default we don’t need to call it by the command ‘–enablerepo=*****’
so it is not needed to change something, just do
wget http://download.opensuse.org/repositories/home:kot1grun/CentOS_6/home:kot1grun.repo -O /etc/yum.repos.d/urbackup.repo
yum install http://mirror.de-labrusse.fr/nethserver/nethserver-urbackup/nethserver-urbackup-0.0.1-1.ns6.sdl.noarch.rpmhallo stephane, tried it and it works, but the /var/lib/urbackup dir must be done manually. is it supposed to be this way or do you want to give a standard dir? Maybe it’s an idea to install a standard dir and give users an advice about it or that they can choose any other directory. The advantage would be, that the standard user can install urbackup without using the console.
Oups…it is a bug
It’s not a bug, it is a feature you claim
off-topic:
wget http://download.opensuse.org/repositories/home:kot1grun/CentOS_6/home:kot1grun.repo -O /etc/yum.repos.d/urbackup.repo
yum install http://mirror.de-labrusse.fr/nethserver/nethserver-urbackup/nethserver-urbackup-0.0.2-1.ns6.sdl.noarch.rpm
new version, /var/lib/urbackup is created automatically but you must set it manually in the setting tabs. I have asked to the urbackup community how I can push my specific settings directly after the installation… wait and see.
confirm that this works. I hope that the urbackup community is as helpfull as nethserver community! 
It’s seems so… The main dev is really reactive
Just a quick question: Is it possible to use uRbackup with a webdav volume on a remote system? Then it might be possible to use something like owncloud as a place to store the backups
Well I’m not sure that a webdav file system is a good choice to store backups. NFS, SMB, FTP, local hard drive are often a good choice in term of reliability and speed.
In fact neither urbackup or backuppc give you this feature. Of course if I’m wrong, please shout !
thnx stephdl for clearing that up. Itś not that I absolutely need webdav, but more an idea to make use of an owncloud solution.
Just whant to give a short feedback after some weeks of use.
Urbackup works stable and without any issue.
After some playing with settings, i found the right for me, so consumed diskspace isn’t to high.
I have 12 clients on urbackup and all are working smooth.
The only thing I had to figure out was to delete the "server_indents.txt " and “session_idents.txt” in programmfolder, when a client lost his connection and didn’t find it again. But that was because of tests with urbackup on a ns7a3-vm. So i like urbackup and will keep it for my clients.
Thanks again to @stephdl for your work.
Thanks for your feedback I’d like to see urbackup in our NethForge soon, so everyone can use it and improve their NethServer installations. I’m also thinking about a blog post on NethServer as Backup Station Machine