The Unique ID search allows you to search for a specific document based on a code which is attributed to only that particular document. This is a feature than can be activated upon request. To find the unique ID of a particular document:
Open up the file history and click on any document to bring out the preview pane.
The Unique ID will appear beside the download icon at the top of the preview pane. It will be denoted with a dark orange/brown background.
To use the Unique ID parameter in the document search, follow these steps:
Click on the Document Search option on the left hand pane.
Once opened, click on Action Filter.
Click on the drop-down menu under Filter Type then select Unique Id.
Paste in the unique ID for the document you are searching for in the right-most field and then click Filter.