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WU_E_METADATA_TIMESTAMP_TOKEN_MISSING
WU_E_METADATA_TIMESTAMP_TOKEN_MISSING means Windows Update expected timestamp evidence for the metadata signature but did not receive it. A timestamp helps establish when a signature was created and is evaluated as part of the metadata trust decision.
What to check
- Check whether the update source supplied incomplete metadata or whether a cache or proxy altered the response.
- For internally published content, verify the timestamping configuration used during catalog signing.
- Review companion certificate and signature errors before changing the client certificate store.
Microsoft: Windows Update security
Microsoft: Authenticode digital signatures
Microsoft: Windows Update error reference
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