WSUS 3.0 Release Candidate now available!

The WSUS 3.0 product team is pleased to announce the availability of WSUS 3.0 RC, published this morning at 9:00am.  The WSUS 3.0 RC is available from

WSUS 3.0 RC delivers new features that enable admins to more easily manage
and deploy updates across the organization.  New features in WSUS 3.0 include a new MMC -based UI with advanced filtering and reporting, improved performance and operational reliability, flexible deployment options to improve branch office support, and more content access throught the Microsoft Update Catalog site.

If you have participated in the WSUS B2 program, you will not be required to re-register, but can access the bits and information directly from your "My participation" link.  If you are just trying out WSUS 3.0 RC for the first time,  you will find the WSUS RC release listed at the bottom of available connections on the main Connect site after signing in with either a Passport or Live account.  After filling out the brief registration, (which helps us know  more about the profile of customers and their environments which an have interest in WSUS), you will be able to access the program and download the bits and documentation from the downloads link.

Take WSUS 3.0 RC for a test drive and give us your feedback either via the peer and product=-team supported newsgroups, or direcly file a bug via the Connect feedback page and attach WSUS log files.

Look forward to your thoughts and thank you for trying the WSUS 3.0 RC beta release!

The WSUS 3.0 team

Comments (59)

  1. Anonymous says:

    Still not clear on Vista Support – does WSUS RC1 support Vista RTM products? I believe this was an issue in Beta 2

  2. Anonymous says:

    Will the Beta2 be upgradeable to the final release?  Is there anyway to move to the RC without rebuilding from scratch?

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  4. Anonymous says:

    Many bugs fixed and hopefully not much broken. You can read about it here.

  5. Matt says:

    Awesome, but i cant get through the configuration because it wont get passed the proxy stage. Using the same information for my proxy as i did on the last version, and it wont take. Even when i use our proxy that allows anonymous connections it times out, and when i use our proxy that requires authentication, and i provide it, locks my domain admin account out and says requires authentication.  :/

  6. Tommy says:

    Matt i was having the same problem, try looking in your eventlog for crypt32 errors, if you have them try looking at:

  7. Matt says:

    Thanks tommy, i cleared out the root cert updates per the KB article but still cant get through the proxy config. No idea what to try at this point.

  8. Marc says:


    I have the same problem, at the proxy stage, I receive an error "could not establish trust relationship for the SSL/TLS secure channel – the remote certificate is invalid according to the validation procedure".

    It is the same proxy configuration as it was for the WSUS3 beta 2 test server. (and there was no problem)

    I have tried the possible resolution of the kb317541 article but it doesn’t work 🙁

  9. Mandala says:

    ME too, same problem same upgrade from a wsus 2.0 version but a small différence. With a proxycfg -u, i’ve been able to use the synchro during 12 minutes before this error append again. And now no more synchro

  10. abraham says:

    When is the final release due out?

  11. Matt says:

    Update: I was able to get through the proxy config by running proxycfg -d and forcing it to our proxy server that allows anonymous traffic, but this still doesnt explain why i cant set it up through our normal proxy like i had it setup in the beta 2 version.

  12. Jeff25 says:

    Does the RC install over Beta2?  I ran the setup and it uninstalls beta 2.  I was allowed to keep my database, downloads, etc, but then when installing RC, it says the database is a old one and can’t be used.  What’s up?

  13. Jürgen Winter says:

    Upgrading from pre-release Versions of WSUS 3.0 is not supported. Quote from the Release Notes:

    "If you have a prerelease version of WSUS 3.0 already installed, you will need to uninstall it and delete the database before installing a later version of WSUS 3.0.".

  14. Phil Leinhauser says:

    Same problem with Proxy authentication here.  

    I was running WSUS 3 Beta2 and just upgraded to RC.  I’m using the exact same settings for proxy but am getting the following error message:

    WebException: The remote server returned an error: (407) Proxy Authentication Required.

    at System.Net.HttpWebRequest.GetRequestStream()

      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)

    Anyone find the fix for this??  

  15. TK says:

    We’re also having the same proxy problems listed above.  Our proxy server requires user authentication.   Our WSUS 2.0 works fine.

    Are you all of you having this problem sitting behind proxy servers that require user authentication?

  16. TK says:

    We’re also having the same proxy problems listed above.  Our proxy server requires user authentication.   Our WSUS 2.0 works fine.

    Are you all of you having this problem sitting behind proxy servers that require user authentication?

  17. Tommy says:

    Im not behind a proxy server that requires auth.

    So proxycfg -u worked for me (took the settings from internet explorer), after that i could sync just fine, and my crypt32 errors went away.

  18. Brian says:

    I have a clean install of this on two servers and neither of them will sync to get updates… The last sync result says… The upstream server experienced an unexpected error. Please try again later… The upsteam server for both of these is the outside MS server not any of mine. Anyone else seeing this?

  19. Olli says:

    I’m behind a proxy server too. My solution:

    proxycfg -p <Proxyserver:Port>

    after that it works fine.

  20. Brian says:

    I am not behind a proxy.. I tried the proxycf -u and it had no change.. It still will not connect.

  21. Brian says:

    Anymore thoughts on why this is not connecting to the MS server to get the updates?

  22. russell says:

    I am behind a proxy and i am experiencing the following synchronisation error:

    The upsteram server experienced an unexpected error.  Please try again at a later time.

    Does anyone have a fix for this?

  23. Michel says:

    Uncheck the product ‘Office 2007’ and sync again, that fixed it for me.

  24. russell says:

    Thanks….that worked a treat!

  25. Fritsch says:

    Ok the WSUS RC is up and running….

    it has synchronized with MS

    but there is no client ….. what happens?????

    in Beta2 all clients where visable 🙁

  26. russell says:

    Have you set the location of where WSUS is in Group Policy?  ie which server and port  http://[servername]:8530

  27. Matt says:

    I should have had the hindsight to put the database on a different partition (can’t remember if it gave me the choice) but now I can’t figure out how to move the SUS 3 database to another drive.

  28. Fritsch says:

    Ok the Client worked with WSUS 2 and WSUS 3 Beta

    now there is no Client visable

    I think it’s a Server problem

    here is the Eventlog from WSUS

    Quelle Kategorie Ereignis Benutzer Computer Beschreibung

    Windows Server Update Service Clients 13042 Nicht zutref. WSUS Selbstupdate funktioniert nicht.

    Windows Server Update Service Clients 13051 Nicht zutref. WSUS 51Kein Clientcomputer hat jemals eine Verbindung mit dem Server hergestellt.

    Windows Server Update Service Web Services 12002 Nicht zutref. WSUS Der Berichterstattungswebdienst funktioniert nicht.

    Windows Server Update Service Web Services 12032 Nicht zutref. WSUS Der Serversynchronisierungs-Webdienst funktioniert nicht.

    Windows Server Update Service Web Services 12022 Nicht zutref. WSUS Der Clientwebdienst funktioniert nicht.

    Windows Server Update Service Web Services 12042 Nicht zutref. WSUS Der SimpleAuth-Webdienst funktioniert nicht.

    Windows Server Update Service Web Services 12052 Nicht zutref. WSUS Der DSS-Authentifizierungswebdienst funktioniert nicht.

  29. Anthony says:

    Will we be able to upgrade to the RTM of WSUS 3.0 from RC1?  I would love to upgrade my WSUS 2.0 to 3.0 RC1 only if I dont have to pull and uninstall/reinstall fro the RTM.


  30. James Sudbury says:

    Has the RC download been pulled from I can’t seem to find WSUS mentioned anywhere!

  31. Tim Carr says:

    Agreed – I’m not seeing it either…

    Methinks that’s not a good sign.

  32. Flinders says:

    I’ve been going round and round looking for the sign up link.

    maybe it will work!

  33. Jeff Messer says:

    Thanks Flinders, I was doing the same registration search dance, thanks for the reg link.

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  35. poohey says:

    can’t get anywhere – no download links, no questions asked, nothing…

    is there a problem with the site or….

  36. Frank says:

    i cant view the sychronization tab on wsus 3.0 and it is the first tyme av installed wsus

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