What does HRESULT 0x803E011A (WPN_E_CLOUD_AUTH_UNAVAILABLE) mean?

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WPN_E_CLOUD_AUTH_UNAVAILABLE: The notification platform is unable to retrieve the authentication credentials required to connect to the cloud notification.

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WPN_E_PUSH_NOTIFICATION_INCAPABLE	WPN_E_CLOUD_SERVICE_UNAVAILABLE

WPN_E_CLOUD_AUTH_UNAVAILABLE

WPN_E_CLOUD_AUTH_UNAVAILABLE is an HRESULT used by the Windows notification platform. It means that the platform could not acquire the authentication credentials it needs to connect to the cloud notification service.

What to check for WPN_E_CLOUD_AUTH_UNAVAILABLE

Check network access, account state, time synchronization, and authentication service availability.
Inspect platform diagnostics for a more specific underlying authentication error.
Retry later with backoff; do not log or attempt to fabricate cloud credentials.

Microsoft documentation

Diagnostic discriminator: Separate authentication acquisition from network reachability: if the cloud endpoint is reachable but the platform cannot obtain its credential, investigate account, time and authentication-service state rather than channel payloads.

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