A dead-letter destination is configured but no events appear in it after failures. What is a common cause?
- A The subscription has no filters
- B Event Grid's identity lacks write permission on the dead-letter storage container (correct answer)
- C Events are too small
- D Retries are disabled
Shortcut: Dead-lettering requires the Event Grid managed identity (or the configured identity) to have Storage Blob Data Contributor on the destination container; otherwise the write silently fails.