You can search for files and folders with a specific attribute name or value.
Click Files in the side panel. (If Files is not shown, see Customize the Side Panel for details on how to add it.)
Use the Search Bar
Enter the attribute name or value in the search bar at the top of the window.
Press Enter. The search results appear. Note that in addition to finding attributes, the search will find all instances of the term in Blue Relay (in comments, issues, status, folder names, file names, etc.)