Index: base/univention-lib/python/umc_connection.py
===================================================================
--- base/univention-lib/python/umc_connection.py	(Revision 48365)
+++ base/univention-lib/python/umc_connection.py	(Arbeitskopie)
@@ -85,7 +85,7 @@
 		data = self.build_data({'username' : username, 'password' : password})
 		con = self.get_connection()
 		try:
-			con.request('POST', '/umcp/auth', data)
+			con.request('POST', '/umcp/auth', data, headers=self._headers)
 		except Exception as e:
 			# probably unreachable
 			if self._error_handler: