diff --git a/base/univention-network-manager/univention-register-network-address b/base/univention-network-manager/univention-register-network-address
index b5bf5e1..90bb8bc 100755
--- a/base/univention-network-manager/univention-register-network-address
+++ b/base/univention-network-manager/univention-register-network-address
@@ -33,21 +33,26 @@
 import sys
 import optparse
 import netifaces
-import subprocess
 import univention.config_registry
 import univention.uldap
 
+from univention.lib.umc import Client, HTTPError, ConnectionError
+
 
 def register_iface(configRegistry, iface, verbose):
-	# is fallback different from current address?
-	p1 = subprocess.Popen(['/usr/sbin/umc-command', '-U', '%s$' % configRegistry.get('hostname'), '-y', '/etc/machine.secret', '-s', configRegistry.get('ldap/master'), 'ip/change', '-o', 'ip=%s' % configRegistry.get('interfaces/%s/address' % iface), '-o', 'oldip=%s' % configRegistry.get('interfaces/%s/fallback/address' % iface), '-o', 'netmask=%s' % configRegistry.get('interfaces/%s/netmask' % iface), '-o', 'role=%s' % configRegistry.get('server/role')], shell=False, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
-	res = p1.communicate()
-	if p1.returncode != 0:
-		print 'ERROR: IP registration for %s failed with code %s' % (iface, p1.returncode)
+	try:
+		client = Client()
+		client.authenticate_with_machine_account()
+		return client.umc_command('ip/change', {
+			'ip': configRegistry.get('interfaces/%s/address' % iface),
+			'oldip': configRegistry.get('interfaces/%s/fallback/address' % iface),
+			'netmask': configRegistry.get('interfaces/%s/netmask' % iface),
+			'role': configRegistry.get('server/role')
+		}).result.get('success', True)
+	except (HTTPError, ConnectionError) as exc:
 		if verbose:
-			print 'More information: %s\n%s' % (res[1], res[0])
-		return False
-	return True
+			print '%s: %s' % (type(exc).__name__, exc)
+	return False
 
 
 if __name__ == '__main__':