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.aspxA common issue we seem to get calls on again and again is the issue where a customer has WSUS configured but when he or she goes to the admin console some clients appear and others do not. You may even notice that it seems to change on a random basis,en-USCommunityServer 2.1 SP1 (Build: 61025.2)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#3246109Wed, 27 May 2009 11:59:40 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3246109snirh<p>Hi,</p> <p>There is a tool for solving Duplicate SID and Duplicate WSUS ID's on your network.</p> <p>It called DSM (Duplicate SID Monitor), the good thing about it that it will monitor your network all the time and not just the one time you ran the script to solve a problem.</p> <p>Link to the tool: <a rel="nofollow" target="_new" href="http://www.smart-x.com/?CategoryID=176&amp;ArticleID=97&amp;sng=1">http://www.smart-x.com/?CategoryID=176&amp;ArticleID=97&amp;sng=1</a></p>