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MQ_ERROR_MESSAGE_STORAGE_FAILED
Retry and cleanup
Do not downgrade to express delivery silently; repair storage or quota conditions and reconcile whether any copy exists.
Avoiding a false diagnosis
A running MSMQ service and available free space do not rule out quota, metadata, permission, or durable-write failures. Code-specific condition: durability failure before send completion.
Example
A journal-enabled queue encounters it. It preserves MSMQ events and storage evidence, repairs quota/volume conditions, and verifies durability without downgrading delivery.
References
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