I have run "wuauclt /resetauthorization /detectnow" and Update Status still shows Unknown. Alert Status and Agent Status report OK. Hard Disks shows "0 - OK". When I run "Detect Software and Updates Now", the task completes successfully. Out of 359 windows clients roughly half show Update Status Unknown and half show Update Status OK. Thanks, F.Palacio

Hello Palacio, It seems like an issue related with duplicate SUSClient ID: If you have many managed computers that are not reporting to the Essentials server, and you use an image to install the operating system on computers, the most likely cause of this issue is that the managed computers are sharing the same SUSClientID. The WSUS technology in Essentials uses the SUSClientID to uniquely identify each managed computer that contacts the Essentials server. If more than one computer is using the same duplicate SUSClientID, only the first computer that reports to the Essentials server will be fully managed. If this is the case in your environment, check out these articles for cleaning up this issue, and also fix your image so that you do not have to deal with this issue in the future. A Windows 2000-based, Windows Server 2003-based, or Windows XP-based computer that was set up by using a Windows 2000, Windows Server 2003, or Windows XP image does not appear in the WSUS console http://support.microsoft.com/kb/903262 Resolving the duplicate SUSClientID issue, or “Why don’t all my clients show up in the WSUS console?” http://blogs.technet.com/sus/archive/2009/05/05/resolving-the-duplicate-susclientid-issue-or-why-don-t-all-my-clients-show-up-in-the-wsus-console.aspx If this is not the case in your environment, please refer to the article below to check if it is related with the Group Policy or Connectivity problem. Troubleshooting 'Unknown' software and update status, 'Not yet contacted' and lack of hardware and software inventory http://blogs.technet.com/systemcenteressentials/archive/2010/03/29/troubleshooting-unknown-software-and-update-status-not-yet-contacted-and-lack-of-hardware-and-software-inventory.aspx Thanks,Yog Li -- Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Yog Li, The http://support.microsoft.com/kb/903262 procedure did the trick! Thank you very much!F.Palacio

Hi, Very glad to hear the issue resolved. Also, if you have any further concerns, please do not hesitate to let us know and we are happy to be of further assistance. Thanks,Yog Li -- Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.