Scroll Documents automatically generates share links for document versions you've saved. These links only work for logged-in Confluence users. If you want to share a document with someone outside your Confluence system, you could export the document to share as a PDF or Word file.
Link to a document version
Navigate to the Document manager and open the Versions section
In the version history table locate the version you want to read and click on the 'Read' action
In the Document Reader, click on the Share button on the top right, copy the url and use it to link to the document.