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WU_E_PT_HTTP_STATUS_NOT_SUPPORTED
WU_E_PT_HTTP_STATUS_NOT_SUPPORTED corresponds to the Windows Update protocol mapping for an HTTP 500 server error where the required functionality is not supported. The client reached the server, so server and intermediary logs are central to diagnosis.
What to check
- Check whether the WSUS server, proxy, or reverse proxy supports the requested update-service operation.
- Inspect IIS and WSUS logs for the detailed server exception instead of relying on the client HRESULT alone.
- Compare the request with a known-good client to see whether the failure is caused by one specific operation or metadata set.
Microsoft: WSUS messages and troubleshooting tips
Microsoft: Troubleshoot WSUS connection failures
Microsoft: Windows Update error reference
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