When non-image documents are viewed or indexed in the Disconnected Scanning client while Encrypt local diskgroup is enabled, they are temporarily saved to a folder in the local Disk Group (for example, C:\Disconnected Scanning\Docs\temp). When the Disconnected Scanning client is closed, this folder is deleted.
By default, Microsoft Office documents are opened in an external viewer rather than within the Disconnected Scanning client. If the documents are still open in the external viewer when the Disconnected Scanning client is closed, and Encrypt local diskgroup is enabled, those documents will not be deleted from the temp folder in the local Disk Group. To prevent this behavior, you must modify the registry to allow the documents to be viewed within the Disconnected Scanning client. For more information on modifying the registry for Microsoft Office documents, search the Microsoft Support documentation for Microsoft Office documents open in a new application window.