Filecatalyst Manuals __exclusive__

So the proper article is either or none (zero article), depending on context.

: Focuses on the web-based portal that simplifies file sharing and submission. This manual is crucial for administrators setting up automated folder structures, metadata fields, and email notifications. filecatalyst manuals

The correct phrasing depends on whether you are referring to the product name as a single noun or as an attributive modifier. So the proper article is either or none