The last catalog synchronization attempt was unsuccessful.

Details
Product: .NET Framework
Event ID: 10022
Source: Windows Server Update Services
Version: 2.0.50727
Symbolic Name: HealthCoreCatalogSyncRed
Message: The last catalog synchronization attempt was unsuccessful.
   
Explanation
WSUS catalog synchronization depends on connectivity to the upstream server or Microsoft Update.
   
User Action
Failed Catalog Synchronization

The last catalog synchronization with the upstream WSUS server failed.

Possible resolutions include:

  • Intermittent network connectivity loss to the upstream server. Review event logs for possible sources of the service disruption.
  • Check the update server and proxy settings in the WSUS administration console.
    1. Start WSUS 3.0: Click Start , click Administrative Tools, and then click Microsoft Windows Server Update Services v3.0.
    2. Click Options.
    3. Click Update Source and Proxy Server.
    4. Review update source settings and make changes as needed.
    5. Review proxy server settings and make changes as needed.
    6. Click Synchronization Results.
    7. In the Action pane, click Synchronize Now.

Verify

Look for the corresponding error event.

  1. Open a command window.
  2. Type cd <WSUSInstallDir>\Tools
  3. Type wsusutil checkhealth
  4. Type eventvwr
  5. Review the Application log for the most recent events from
    source Windows Server Update Services and event id 10020.

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