I've been battling this error for the last couple of days, and haven't been able to make any headway. Most of the searching I've done seems to allude that it's an issue with clutter being enabled on the mailbox, but that is not the case. Any help would be greatly appreciated.
SMTP Exception: The server rejected the message: 554 5.2.0 STOREDRV.Submission.Exception:StoragePermanentExce ption.MapiExceptionDuplicateDelivery; Failed to process message due to a permanent exception with message Cannot get ID from name.
SMTP Exception: The server rejected the message: 554 5.2.0 STOREDRV.Submission.Exception:StoragePermanentExce ption.MapiExceptionDuplicateDelivery; Failed to process message due to a permanent exception with message Cannot get ID from name.
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