The ACL of the temporary folder couldn't be set because the WebReady Document Viewing Manager doesn't have the permissions ...

The ACL of the temporary folder couldn't be set because the WebReady Document Viewing Manager doesn't have the permissions to set it. 
The value of the temporary folder is set by a registry key. If the registry key doesn't exist, the default Microsoft Windows temporary folder will be used. The registry key that controls the temporary folder is named HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchange OWA\WebReadyDocumentViewing	empFolderLocation. 
For WebReady Document Viewing to function correctly, the Local System account must have full control permissions assigned to the temporary folder that you have configured.
Exception message: "%1".
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