Adobe notes that Flash is now deprecated and no longer used in its Acrobat DC desktop app. Previously, there were options or a button in Acrobat to collect user responses from a forms file that relied on Flash, such as Update, Filter, Export (All/Selected), Archive (All/Selected), Add, and Delete.
Adobe says the Flash-dependent forms options have been replaced with a 'secondary toolbar' containing action buttons to Update, Add, Delete, Export, and Archive those Form responses.
Additionally, Adobe's PDFMaker menu in Microsoft's Word and PowerPoint apps no longer have the Insert Media button, which previously allowed Office users to embed Flash content in documents.
"By default, Microsoft has disabled the ability to add Flash or Rich media content in the Office documents. If your document already has flash content embedded in it, Acrobat prevents embedding of Flash or Rich media in the converted PDF file and adds an image instead," Adobe notes.
"If you have enabled the Flash content in Microsoft documents, Acrobat adds a blank box in the converted PDF file."