SNMP polling requires having snmpd installed. This is trivial to do: »apt-get install snmpd«. Generally UCS works like a Debian system in this regard. Pages such as this one or that one have more details.
Sending syslog messages to remote servers is easy, too, but it cannot be done via the Univention Management Console. Instead simply create a file in /etc/rsyslog.d ; ours is called »linet.conf«. Insert the following content:
Replace »remote-server-hostname« with your syslog server's host name (or IP address). Finally restart rsyslog: »service rsyslog restart«.