Step-by-Step Instructions

Launch the Office application (Word, Excel, PowerPoint) and open the document you'd like to check for accessibility.

Word and PowerPoint:

1. Go to the Review tab on the Ribbon.
2. Click on Check Accessibility in the Accessibility group. 

Excel:

1. Go to the Review tab.
2. Click on Check Accessibility.
3. Review the Results:
   A pane will open on the right side of the window showing accessibility issues. The issues are categorized by severity: Errors, Warnings, and Tips.
4. Fix the Issues: Click on each issue to get more details and suggested fixes. Follow the recommendations to improve the document's accessibility. You can click on hyperlinks provided for direct navigation to the problematic areas in your document.
5. Re-check the Document: After making changes, you can run the Accessibility Checker again to ensure all issues have been addressed.
6. Save Your Document: Once all accessibility issues have been resolved, save your document to preserve the changes. 

Additional Tips:

Keyboard Shortcuts: You can also use Alt + R, A (for Review and Accessibility) to quickly access the Accessibility Checker.