Windows 2012 Server bekommen keine Updates über WSUS 4.0

Hallo liebe Community,

nach der Migration auf Windows 2012 Server (wir setzen die Datacenter Edition ein) haben wir das Problem, dass die Windows 2012 Server keine Updates mehr von unserem WSUS-Server ziehen. Wir haben den WSUS-Server unter W2K12 komplett neu aufgesetzt, konfiguriert, die GPOs angepasst usw. Die Windows 7 und die noch vorhanden XP-Clients tauchen in der WSUS-Verwaltungs brav auf, ebenso wie die alten W2K3-Server. Nur die Windows 2012 Server weigern sich standhaft. Leider habe ich im Web nichts wirklich brauchbares dazu gefunden. Anbei ein Auszug aus der WindowsUpdate.log eines der betroffenen Server, nach der Eingabe des Befehls wuauclt /reportnow:

2013-11-27	11:50:35:729	 852	df8	AU	AU finished delayed initialization
2013-11-27	11:56:48:573	 852	df8	AU	###########  AU: Uninitializing Automatic Updates  ###########
2013-11-27	11:56:48:667	 852	df8	WuTask	Uninit WU Task Manager
2013-11-27	11:56:48:713	 852	df8	Service	*********
2013-11-27	11:56:48:713	 852	df8	Service	**  END  **  Service: Service exit [Exit code = 0x240001]
2013-11-27	11:56:48:713	 852	df8	Service	*************
2013-11-27	11:57:38:248	 852	f00	Misc	===========  Logging initialized (build: 7.8.9200.16693, tz: +0100)  ===========
2013-11-27	11:57:38:248	 852	f00	Misc	  = Process: C:\Windows\system32\svchost.exe
2013-11-27	11:57:38:248	 852	f00	Misc	  = Module: c:\windows\system32\wuaueng.dll
2013-11-27	11:57:38:248	 852	f00	Service	*************
2013-11-27	11:57:38:248	 852	f00	Service	** START **  Service: Service startup
2013-11-27	11:57:38:248	 852	f00	Service	*********
2013-11-27	11:57:38:248	 852	f00	Agent	  * WU client version 7.8.9200.16693
2013-11-27	11:57:38:264	 852	f00	Agent	  * Base directory: C:\Windows\SoftwareDistribution
2013-11-27	11:57:38:264	 852	f00	Agent	  * Access type: No proxy
2013-11-27	11:57:38:264	 852	f00	Service	UpdateNetworkState Ipv6, cNetworkInterfaces = 1.
2013-11-27	11:57:38:264	 852	f00	Service	UpdateNetworkState Ipv4, cNetworkInterfaces = 1.
2013-11-27	11:57:38:264	 852	f00	Agent	  * Network state: Connected
2013-11-27	11:57:38:264	 852	f00	Service	UpdateNetworkState Ipv6, cNetworkInterfaces = 1.
2013-11-27	11:57:38:264	 852	f00	Service	UpdateNetworkState Ipv4, cNetworkInterfaces = 1.
2013-11-27	11:57:38:389	 852	f00	DtaStor	Default service for AU is {00000000-0000-0000-0000-000000000000}
2013-11-27	11:57:38:404	 852	f00	DtaStor	Default service for AU is {9482F4B4-E343-43B6-B170-9A65BC822C77}
2013-11-27	11:57:38:404	 852	f00	DtaStor	Data store successfully created
2013-11-27	11:57:38:404	 852	f00	Agent	WARNING: could not get the auth file name 0x80070002
2013-11-27	11:57:38:404	 852	f00	Agent	WARNING: Service Recovery: Attempting to add pending registration for service 7971f918-a847-4430-9279-4a52d1efe18d to the data store
2013-11-27	11:57:38:404	 852	f00	Agent	***********  Agent: Initializing global settings cache  ***********
2013-11-27	11:57:38:404	 852	f00	Agent	  * Endpoint Provider: 00000000-0000-0000-0000-000000000000
2013-11-27	11:57:38:404	 852	f00	Agent	  * WSUS server: http://<Name WSUS>:8530
2013-11-27	11:57:38:404	 852	f00	Agent	  * WSUS status server: http://<Name WSUS>:8530
2013-11-27	11:57:38:404	 852	f00	Agent	  * Target group: (Unassigned Computers)
2013-11-27	11:57:38:404	 852	f00	Agent	  * Windows Update access disabled: No
2013-11-27	11:57:38:404	 852	f00	Misc	WARNING: Network Cost is assumed to be not supported as something failed with trying to get handles to wcmapi.dll
2013-11-27	11:57:38:404	 852	f00	WuTask	WuTaskManager delay initialize completed successfully..
2013-11-27	11:57:38:420	 852	f00	Report	CWERReporter::Init succeeded
2013-11-27	11:57:38:420	 852	f00	Agent	***********  Agent: Initializing Windows Update Agent  ***********
2013-11-27	11:57:38:420	 852	f00	DnldMgr	Download manager restoring 0 downloads
2013-11-27	11:57:38:420	 852	f00	AU	###########  AU: Initializing Automatic Updates  ###########
2013-11-27	11:57:38:420	 852	f00	AU	AIR Mode is disabled
2013-11-27	11:57:38:420	 852	f00	AU	  # Policy Driven Provider: http://<Name WSUS>:8530
2013-11-27	11:57:38:420	 852	f00	AU	  # Detection frequency: 22
2013-11-27	11:57:38:420	 852	f00	AU	  # Approval type: Scheduled (Policy)
2013-11-27	11:57:38:420	 852	f00	AU	  # Auto-install minor updates: Yes (User preference)
2013-11-27	11:57:38:420	 852	f00	AU	  # Will interact with non-admins (Non-admins are elevated (User preference))
2013-11-27	11:57:38:420	 852	f00	AU	WARNING: Failed to get Wu Exemption info from NLM, assuming not exempt, error = 0x80240037
2013-11-27	11:57:38:436	 852	f00	AU	AU finished delayed initialization
2013-11-27	12:07:39:464	 852	f00	AU	###########  AU: Uninitializing Automatic Updates  ###########
2013-11-27	12:07:39:604	 852	f00	WuTask	Uninit WU Task Manager
2013-11-27	12:07:39:636	 852	f00	Service	*********
2013-11-27	12:07:39:636	 852	f00	Service	**  END  **  Service: Service exit [Exit code = 0x240001]
2013-11-27	12:07:39:636	 852	f00	Service	*************

Es wäre super, wenn jemand eine Idee hätte.

Danke und Grüße ins Forum