Any author (with or without a disability) can use the Accessibility Checker feature to find potential accessibility issues and instructions for how to fix them. This article provides details on the issues the Accessibility Checker looks for, and gives some information on how to resolve them.
Through notifications in the Backstage View and a task pane that helps authors navigate to, and resolve issues in their file, the purpose of the Accessibility Checker is to help authors improve the accessibility of documents, spreadsheets, and presentations that they create.