Open a Word or PowerPoint Files
Click File > Info.
Select the Check for Issues button.
In the Check for Issues drop-down menu, select Check Accessibility.
The Accessibility Checker task pane appears next to your content and shows the inspection results
To see information on why and how to fix an issue, under Inspection Results, select an issue. Results appear under Additional Information, and you’re directed to the inaccessible content in your file.
Additional Resources:
Use the Accessibility Checker to find accessibility issues
Make your content accessible to everyone