No Univention System Setup after first Boot after Installation - How to start manual

Hello threre,
i tried Univention Corporate Server 4.3 and 4.4 on HP Proliant MicroServer Gen 10.
Installation works, but after the first boot there is no continuing with Univention System Setup where i can set up domain etc. How can i start this manual?

Christian.

Ok,i found the error. I had to use the Grub from Debian 10 for the first install, because the grub from Univention did not detect all hardware. I just missed the preseed file on boot. I installed again with this file. Would be nice if there were some point in documentation about this.

GRUB>set root=(x,y)
GRUB>linux /install.amd/vmlinuz preseed/file=/cdrom/preseed.cfg
GRUB>initrd /install.amd/initrd.gz
GRUB boot