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Patch Manager returns the following error after it tries unsuccessfully to connect to a WSUS server.
Error Message: The request failed with HTTP status 404: Not Found.
Patch Manager is configured to connect to the WSUS server on a different port than the one on which the WSUS server is installed. This is a common issue in environments that use a port other than 80 for WSUS.
Note: WSUS version 6 (installed on Windows Server 2012) installs to port 8530 by default.
Update the WSUS configuration in Patch Manager to reflect the correct port.
To change the port assigned to a WSUS server in Patch Manager: