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MF_E_NET_SERVER_UNAVAILABLE
MF_E_NET_SERVER_UNAVAILABLE indicates a temporary server-side unavailability, typically overload or maintenance. It should not be treated as proof that the URL or credentials are invalid.
Diagnostic discriminator: Preserve the server or proxy response and the exact time window before retrying. If the same URL becomes available without request or credential changes, treat the result as transient service health rather than invalid URL or authentication.
What to check for MF_E_NET_SERVER_UNAVAILABLE
- Check server capacity, maintenance windows, and upstream dependency health.
- Retry with backoff after confirming that the endpoint is intended to be temporary.
- Use server and proxy logs to distinguish overload from an incorrect route.
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