WSUS-Server Nachinstallationsaufgaben: WSUS Server konnte nicht gestartet und nicht konfiguriert werden

Hallo,
die Nachinstallationsaufgabe schlägt immer fehl, das ist das Protokoll:

2018-03-26 18:19:31 Postinstall started
2018-03-26 18:19:31 Detected role services: Api, UI, WidDatabase, Services
2018-03-26 18:19:31 Start: LoadSettingsFromParameters
2018-03-26 18:19:31 Content local is: True
2018-03-26 18:19:31 Content directory is: C:\WSUS-Updates
2018-03-26 18:19:31 SQL instname is:
2018-03-26 18:19:31 End: LoadSettingsFromParameters
2018-03-26 18:19:31 Start: Run
2018-03-26 18:19:31 Fetching WsusAdministratorsSid from registry store
2018-03-26 18:19:31 Value is S-1-5-21-1146314437-2598271452-3468353292-1144
2018-03-26 18:19:31 Fetching WsusReportersSid from registry store
2018-03-26 18:19:31 Value is S-1-5-21-1146314437-2598271452-3468353292-1145
2018-03-26 18:19:31 Configuring content directory...
2018-03-26 18:19:31 Configuring groups...
2018-03-26 18:19:31 Starting group configuration for WSUS Administrators...
2018-03-26 18:19:31 Found group in regsitry, attempting to use it...
2018-03-26 18:19:31 Searching for existing group...
2018-03-26 18:19:31 Existing group was found
2018-03-26 18:19:31 Writing group to registry...
2018-03-26 18:19:31 Finished group creation
2018-03-26 18:19:31 Starting group configuration for WSUS Reporters...
2018-03-26 18:19:31 Found group in regsitry, attempting to use it...
2018-03-26 18:19:31 Searching for existing group...
2018-03-26 18:19:31 Existing group was found
2018-03-26 18:19:31 Writing group to registry...
2018-03-26 18:19:31 Finished group creation
2018-03-26 18:19:31 Configuring permissions...
2018-03-26 18:19:31 Fetching content directory...
2018-03-26 18:19:31 Fetching ContentDir from registry store
2018-03-26 18:19:31 Value is C:\WSUS-Updates
2018-03-26 18:19:31 Fetching group SIDs...
2018-03-26 18:19:31 Fetching WsusAdministratorsSid from registry store
2018-03-26 18:19:31 Value is S-1-5-21-1146314437-2598271452-3468353292-1144
2018-03-26 18:19:31 Fetching WsusReportersSid from registry store
2018-03-26 18:19:31 Value is S-1-5-21-1146314437-2598271452-3468353292-1145
2018-03-26 18:19:31 Creating group principals...
2018-03-26 18:19:31 Granting directory permissions...
2018-03-26 18:19:32 Granting permissions on content directory...
2018-03-26 18:19:32 Granting registry permissions...
2018-03-26 18:19:32 Granting registry permissions...
2018-03-26 18:19:32 Granting registry permissions...
2018-03-26 18:19:32 Configuring shares...
2018-03-26 18:19:32 Configuring network shares...
2018-03-26 18:19:32 Fetching content directory...
2018-03-26 18:19:32 Fetching ContentDir from registry store
2018-03-26 18:19:32 Value is C:\WSUS-Updates
2018-03-26 18:19:32 Fetching WSUS admin SID...
2018-03-26 18:19:32 Fetching WsusAdministratorsSid from registry store
2018-03-26 18:19:32 Value is S-1-5-21-1146314437-2598271452-3468353292-1144
2018-03-26 18:19:32 Content directory is local, creating content shares...
2018-03-26 18:19:32 Creating share "UpdateServicesPackages" with path "C:\WSUS-Updates\UpdateServicesPackages" and description "A network share to be used by client systems for collecting all software packages (usually applications) published on this WSUS system."
2018-03-26 18:19:32 Deleting existing share...
2018-03-26 18:19:32 Creating share...
2018-03-26 18:19:32 Share successfully created
2018-03-26 18:19:32 Creating share "WsusContent" with path "C:\WSUS-Updates\WsusContent" and description "A network share to be used by Local Publishing to place published content on this WSUS system."
2018-03-26 18:19:32 Deleting existing share...
2018-03-26 18:19:32 Creating share...
2018-03-26 18:19:32 Share successfully created
2018-03-26 18:19:32 Creating share "WSUSTemp" with path "C:\Program Files\Update Services\LogFiles\WSUSTemp" and description "A network share used by Local Publishing from a Remote WSUS Console Instance."
2018-03-26 18:19:32 Deleting existing share...
2018-03-26 18:19:32 Creating share...
2018-03-26 18:19:32 Share successfully created
2018-03-26 18:19:32 Finished creating content shares
2018-03-26 18:19:32 Stopping service WSUSService
2018-03-26 18:19:32 Stopping service W3SVC
2018-03-26 18:19:32 Configuring WID database...
2018-03-26 18:19:32 Configuring the database...
2018-03-26 18:19:32 Establishing DB connection...
2018-03-26 18:19:32 Checking to see if database exists...
2018-03-26 18:19:32 Database exists
2018-03-26 18:19:32 Switching database to single user mode...
2018-03-26 18:19:35 Loading install type query...
2018-03-26 18:19:35 DECLARE @currentdbversion int
DECLARE @scriptmajorversion int = (14393)
DECLARE @scriptminorversion int = (0)
DECLARE @databasemajorversion int
DECLARE @databaseminorversion int
DECLARE @databasebuildnumber nvarchar(10)
IF NOT EXISTS(SELECT * FROM sys.databases WHERE name='SUSDB')
BEGIN
SELECT 1
END
ELSE
BEGIN
SET @currentdbversion = (SELECT SchemaVersion FROM SUSDB.dbo.tbSchemaVersion WHERE ComponentName = 'CoreDB')
SET @databasebuildnumber = (SELECT BuildNumber FROM SUSDB.dbo.tbSchemaVersion WHERE ComponentName = 'CoreDB')
DECLARE @delimiterposition INT = CHARINDEX('.', @databasebuildnumber)
IF (@delimiterPosition = 0)
BEGIN
RAISERROR('Invalid schema version number', 16, 1) with nowait
return
END
SET @databasemajorversion = SUBSTRING(@databaseBuildNumber, 1, @delimiterposition - 1)
SET @databaseminorversion = SUBSTRING(@databaseBuildNumber, (@delimiterPosition + 1), (10 - @delimiterposition))
IF @currentdbversion < 926
BEGIN
SELECT 3
END
ELSE
BEGIN
IF (@scriptMajorVersion > @databasemajorversion OR
(@scriptMajorVersion = @databasemajorversion AND @scriptminorversion > @databaseminorversion))
BEGIN
SELECT 2
END
ELSE IF (@scriptMajorVersion = @databasemajorversion AND
@scriptminorversion = @databaseminorversion)
BEGIN
SELECT 0
END
ELSE
BEGIN
SELECT 4
END
END
END

2018-03-26 18:19:35 Install type is: Reinstall
2018-03-26 18:19:35 Creating logins...
2018-03-26 18:19:35 Fetching account info for S-1-5-20
2018-03-26 18:19:35 Found principal
2018-03-26 18:19:35 Found account
2018-03-26 18:19:35 Got binary SID
2018-03-26 18:19:35 Fetching WsusAdministratorsSid from registry store
2018-03-26 18:19:35 Value is S-1-5-21-1146314437-2598271452-3468353292-1144
2018-03-26 18:19:35 Fetching account info for S-1-5-21-1146314437-2598271452-3468353292-1144
2018-03-26 18:19:35 Fetching account info for S-1-5-21-1146314437-2598271452-3468353292-1144
2018-03-26 18:19:36 Found principal
2018-03-26 18:19:36 Found account
2018-03-26 18:19:36 Got binary SID
2018-03-26 18:19:36 Setting content location...
2018-03-26 18:19:36 Fetching ContentDir from registry store
2018-03-26 18:19:36 Value is C:\WSUS-Updates
2018-03-26 18:19:36 Swtching DB to multi-user mode......
2018-03-26 18:19:37 Finished setting multi-user mode
2018-03-26 18:19:37 Writing DB settings to registry...
2018-03-26 18:19:37 Disposing Connection
2018-03-26 18:19:37 Clearing Connection Pools
2018-03-26 18:19:37 Marking PostInstall done for UpdateServices-WidDatabase in the registry...
2018-03-26 18:19:37 Starting service W3SVC
2018-03-26 18:19:37 Configuring IIS...
2018-03-26 18:19:37 Start: ConfigureWebsite
2018-03-26 18:19:37 Configuring website on port 8530
2018-03-26 18:20:00 2018-03-26 18:19:38 Info IISCustomAction Setupaktion wird ausgeführt, Befehl "/Install"
2018-03-26 18:19:59 Info IISCustomAction Der Befehl "/Install" wurde erfolgreich ausgeführt.

2018-03-26 18:20:00 End: ConfigureWebsite
2018-03-26 18:20:00 Configuring performance counters...
2018-03-26 18:20:00 Configuring Stats.NET perf counter...
2018-03-26 18:20:00 Configuring reporting perf counter...
2018-03-26 18:20:00 Configuring client webservice perf counter...
2018-03-26 18:20:00 Configuring server sync webservice perf counter...
2018-03-26 18:20:00 Configuring API remoting perf counter...
2018-03-26 18:20:00 Bringing services online...
2018-03-26 18:20:00 Checking initialization status...
2018-03-26 18:20:01 StartServer starting...
2018-03-26 18:20:01 Generating encryption key to write to the registry...
2018-03-26 18:20:01 Generating encryption key to write to the database...
2018-03-26 18:20:02 Generating encryption key succeeded...
2018-03-26 18:20:02 Setting WSUSService to autostart...
2018-03-26 18:20:02 WSUSService is set to autostart.
2018-03-26 18:20:02 Starting WSUSService...
2018-03-26 18:20:02 WSUSService is now started.
2018-03-26 18:20:02 Importing default detectoids.
2018-03-26 18:20:02 Importing CriticalUpdates.xml...
2018-03-26 18:20:02 Importing Drivers.xml...
2018-03-26 18:20:02 Importing DriverSets.xml...
2018-03-26 18:20:02 Importing FeaturePacks.xml...
2018-03-26 18:20:02 Importing MicrosoftCorporation.xml...
2018-03-26 18:20:02 Importing SecurityUpdates.xml...
2018-03-26 18:20:02 Importing ServicePacks.xml...
2018-03-26 18:20:02 Importing Tools.xml...
2018-03-26 18:20:02 Importing UpdateRollups.xml...
2018-03-26 18:20:02 Importing Updates.xml...
2018-03-26 18:20:02 Importing Windows.xml...
2018-03-26 18:20:02 Importing Windows2000family.xml...
2018-03-26 18:20:02 Importing WindowsServer2003DatacenterEdition.xml...
2018-03-26 18:20:02 Importing WindowsServer2003Family.xml...
2018-03-26 18:20:02 Importing WindowsXPfamily.xml...
2018-03-26 18:20:02 Importing LocalPublisher.xml...
2018-03-26 18:20:02 Importing LocallyPublishedPackages.xml...
2018-03-26 18:20:02 Importing Applications.xml...
2018-03-26 18:20:02 Importing Exchange.xml...
2018-03-26 18:20:02 Importing Office.xml...
2018-03-26 18:20:02 Importing SQL.xml...
2018-03-26 18:20:02 Importing Exchange2000Server.xml...
2018-03-26 18:20:03 Importing ExchangeServer2003.xml...
2018-03-26 18:20:03 Importing OfficeXP.xml...
2018-03-26 18:20:03 Importing Office2003.xml...
2018-03-26 18:20:03 Importing SQLServer.xml...
2018-03-26 18:20:03 Importing WindowsXP64BitEditionVersion2003.xml...
2018-03-26 18:20:03 Importing DefinitionUpdateSusXml.xml...
2018-03-26 18:20:03 Importing ClientServicingApiDetectoid.xml...
2018-03-26 18:20:03 Importing default detectoids succeeded.
2018-03-26 18:20:04 Synchronization in progress. Please cancel synchronization and rerun postinstall again. Exception: System.Net.WebException: Fehler bei der Anforderung mit HTTP-Status 503: Service Unavailable.
bei System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
bei System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object parameters)
bei Microsoft.UpdateServices.Internal.ApiRemoting.GetServerVersion()
bei Microsoft.UpdateServices.Internal.DatabaseAccess.AdminDataAccessProxy.GetServerVersion()
bei Microsoft.UpdateServices.Internal.BaseApi.UpdateServer.CreateUpdateServer(String serverName, Boolean useSecureConnection, Int32 portNumber)
bei Microsoft.UpdateServices.Internal.BaseApi.UpdateServer..ctor(Boolean bypassApiRemoting)
bei Microsoft.UpdateServices.Setup.StartServer.StartServer.FixSubscriptionCategories()
2018-03-26 18:20:04 StartServer encountered errors. Exception=Synchronization in progress. Please cancel synchronization and run postinstall again.
2018-03-26 18:20:04 Microsoft.UpdateServices.Administration.CommandException: Der WSUS-Dienst konnte nicht gestartet und nicht konfiguriert werden.
bei Microsoft.UpdateServices.Administration.PostInstall.Run()
bei Microsoft.UpdateServices.Administration.PostInstall.Execute(String arguments)


Da steht z.B. auch 2018-03-26 18:20:04 Synchronization in progress. Please cancel synchronization and rerun postinstall again.
nur habe ich die Synchronization nie gestartet. Gibt es vielleicht eine Möglichkeit diese mit einem cmd Befehl oder so zu stoppen?
Liegt es vielleicht an was anderem?
Der Server ist mit dem Internet verbunden.

Danke wieder für die Hilfe ;)

Viele Grüße,
Katalina