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WU_E_SERVICEPROP_NOTAVAIL
WU_E_SERVICEPROP_NOTAVAIL means a caller queried a property that the selected update service does not expose. Service capabilities differ depending on the update source and registration state.
What to check
- Check the service type and registration state before querying optional properties.
- Handle unsupported or absent properties explicitly in tools that work with multiple update services.
- Refresh service metadata after switching update sources or modifying policy.
Service capabilities are not interchangeable
WUA can enumerate and manage multiple update services. An API tool that assumes every service exposes the same optional properties can fail when it switches from the Windows Update service to a scan-package or another registered service. Preserve the service ID and property name at the point of failure; the HRESULT alone does not identify which property was queried.
After policy or service registration changes, enumerate the current service objects again instead of retaining stale metadata. Code that supports several service types should treat unavailable properties as a capability result and use only documented properties for that service. Removing and re-registering a service is not justified unless registration itself is shown to be wrong.
References
- Microsoft: WUA update-service enumerations
- Microsoft: Windows Update Agent API
- Microsoft: WUA success and error codes
References
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