How do I set the edsvaProtectFromDeletion attribute to true using PowerShell

How do I set the edsvaProtectFromDeletion attribute to true using PowerShell?

For example, setting "OU=TEST,OU=Servers,DC=domain,DC=local", I have tried: 

1. Set-QadObject -Identity "OU=TEST,OU=Servers,DC=domain,DC=local" -ObjectAttributes @{edsvaProtectFromDeletion=$true}

2. Set-QadObject -Identity "OU=TEST,OU=Servers,DC=domain,DC=local" -ObjectAttributes @{edsvaProtectFromDeletion='true'}

3. Set-QadObject -Identity "OU=TEST,OU=Servers,DC=domain,DC=local" -ObjectAttributes @{protectedFromAccidentalDeletion=$true}

None of these commands return any errors. Nor do any of them actually set the OU as desired. 

If I open the OU Advanced Properties in Active Roles and set the attribute to TRUE, this then ticks the box in the GUI as desired. 

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