Problem
Clients are not getting IP addresses.
Environment
On a already join UCS slave the ucs@school app has been installed and DHCP service has been configured.
But DHCP service is not running.
Solution
Create the missing symbolic link:
root@ucs:~# ln -s /etc/runinit/univention-dhcp /etc/runinit/univention/univention-dhcp nach
root@ucs:~# systemctl start univention-dhcp