Created two services for manager and server

systemd/xrootd-proxy-manager.service

+[Unit]
+Description=XRootD-Proxy-Manager
+After=syslog.target network.target
+Wants=network.target
+
+[Service]
+User=xrootd
+Type=simple
+RemainAfterExit=yes
+ExecStart=/bin/sh /opt/XRootD/systemd/xrootd-daemon.sh -a start -l /var/log/XRootD/proxy-manager -c /opt/XRootD/configs/proxy-manager.cf -p /var/run/proxy-manager.pid
+ExecStop=/bin/sh /opt/XRootD/systemd/xrootd-daemon.sh -a stop -l /var/log/XRootD/proxy-manager -c /opt/XRootD/configs/proxy-manager.cf -p /var/run/proxy-manager.pid
+
+[Install]
+WantedBy=multi-user.target
+

systemd/xrootd-proxy-server.service

+[Unit]
+Description=XRootD-Proxy-Server
+After=syslog.target network.target
+Wants=network.target
+
+[Service]
+User=xrootd
+Type=simple
+RemainAfterExit=yes
+ExecStart=/bin/sh /opt/XRootD/systemd/xrootd-daemon.sh -a start -l /var/log/XRootD/proxy-server -c /opt/XRootD/configs/proxy-server.cf -p /var/run/proxy-server.pid
+ExecStop=/bin/sh /opt/XRootD/systemd/xrootd-daemon.sh stop -l /var/log/XRootD/proxy-server -c /opt/XRootD/configs/proxy-server.cf -p /var/run/proxy-server.pid
+
+[Install]
+WantedBy=multi-user.target
+