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HTTP 503 error when clicking WSUS from Patch Manager

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Created by Zaquan Henry, last modified by Rodim Suarez on Apr 19, 2017

Views: 174 Votes: 0 Revisions: 8


This article provides steps to resolve the following error when clicking WSUS from Patch Manager:

HTTP 503  


Patch Manager 2.1


  1. Make sure that the proper WSUS services have been started and running.
  2. Open a command prompt as an administrator on the server that houses the WSUS.
  3. Enter the iisreset command. This will issue a reset for the IIS web services. 
  4. Open the Patch Manager server and refresh the WSUS server to regain access . 
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