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Exchange 2010/2016 Troubleshooting: Failed sending mail, #554 5.2.0 STOREDRV

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Issue

In Exchange 2010/2016, you might come across a strange error as shown below when sending email:

Failed to process message due to a permanent exception with message Invalid named property

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Solution

To fix this problem, you need to move the mailbox to another store with a specific switch:

New-MoveRequest "User" -DoNotPreserveMailboxSignature -TargetDatabase Store1

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Once the move has completed, you should no longer receive the delivery error above.