Short answer. In Confluence Cloud, no. The import always creates a new page, because it is an entry point to page creation rather than something you do to a page that already exists. Confluence Data Center can import a Word document into an existing page; Cloud cannot. Your practical options are to import as a new page and move the content across, or to paste the content into the existing page, which is uglier but keeps the page's history, comments and URL. Why the button is not whe...