WSUS Sync failure

JimSym 201 Reputation points
2021-02-07T07:17:51+00:00

SBS2011
WSUS 3.2.7600.226

WSUS sync has started to fail over the last few weeks, initially intermittentl, now I cannot get it to complete at all.
Update source is Microsoft

Console error: Unable to resolve the specified upstream server name.

“WebException: The request failed with HTTP status 404: Not Found.
at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)”
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at Microsoft.UpdateServices.ServerSyncWebServices.ServerSync.ServerSyncProxy.GetAuthConfig()
at Microsoft.UpdateServices.ServerSync.ServerSyncLib.InternetGetServerAuthConfig(ServerSyncProxy proxy, WebServiceCommunicationHelper webServiceHelper)
at Microsoft.UpdateServices.ServerSync.ServerSyncLib.Authenticate(AuthorizationManager authorizationManager, Boolean checkExpiration, ServerSyncProxy proxy, Cookie cookie, WebServiceCommunicationHelper webServiceHelper)
at Microsoft.UpdateServices.ServerSync.CatalogSyncAgentCore.SyncConfigUpdatesFromUSS()
at Microsoft.UpdateServices.ServerSync.CatalogSyncAgentCore.ExecuteSyncProtocol(Boolean allowRedirect)

This seems to be the key bit of the server log

2021-02-06 07:51:26.046 UTC Info w3wp.29 ClientImplementation..ctor Initializing ClientWebService ProcessID = 18412, Process Start Time = 2/6/2021 6:17:59 AM, Product Version = 3.2.7600.325
2021-02-06 07:51:26.065 UTC Info w3wp.29 AuthorizationManager.GetUpstreamServerUriHeader Found config says USS is MU site
2021-02-06 07:51:26.362 UTC Info WsusService.18 SusService.ValidateServerCertificate CheckValidationResult Succeeds: CertOK
2021-02-06 07:51:26.366 UTC Info WsusService.18 ServerCertificateValidator.IsHostAllowedException Requested host: sws1.update.microsoft.com
2021-02-06 07:51:26.367 UTC Info WsusService.18 ServerCertificateValidator.VerifyServerCertificate SSL validation succeeded.
2021-02-06 07:51:26.546 UTC Warning WsusService.18 WebServiceCommunicationHelper.ProcessWebServiceProxyException ProcessWebServiceProxyException found Exception was WebException. Action: Retry. Exception Details: System.Net.WebException: The request failed with HTTP status 404: Not Found.

So it is connecting to sws1.update.microsoft.com, and SSL validation succeeds. It fails after that with some proxy error.

(I realise that this server should be replaced, and work is in hand to migrate to Azure.)

Any help appreciated. Have been unable to fault the installation.

Thanks

Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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47 answers

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  1. Adam J. Marshall 8,711 Reputation points MVP
    2021-02-10T17:46:42.493+00:00

    I've pinged my MVP contacts - let's see if that helps.

    4 people found this answer helpful.
  2. Shlomi Cohen 11 Reputation points
    2021-02-07T12:08:27.827+00:00

    I have the same issue.
    It look like problem with the source server "Not found".

    2 people found this answer helpful.
    0 comments
  3. Laszlo.Kakas 16 Reputation points
    2021-02-07T12:34:34.32+00:00

    Having the same issue here on SBS 2011. According to logs since: 2021-02-04 20:00:06.831 UTC

    2 people found this answer helpful.
    0 comments
  4. Peter Groom 16 Reputation points
    2021-02-08T04:29:55.417+00:00

    Same issue here, SBS2011. Last successful sync was on 5/2/2021 but has been slowly failing for some time.

    2 people found this answer helpful.
    0 comments
  5. MartinBell 11 Reputation points
    2021-02-10T17:01:19.59+00:00

    Maybe it helps to raise attention by MS if every reader of this thread gives an upvote to the initial posting, here:
    66556-image.png

    2 people found this answer helpful.
    0 comments