Office 365 Accessibility Fact Sheet
Accessibility in Office Online
Microsoft Office Online allows you to access and edit files online in your web browser, so all the keyboard shortcuts and other accessibility features that you know from the browser work in Office Online. More accessibility features in Office Online:
Support for assistive technology products. Word Online and PowerPoint Online have display modes that make them accessible to screen readers. If you use assistive technologies, such as a screen reader or speech recognition software, you will have the best experience in Office Online if the assistive technology that you use supports WAI-ARIA. Office Online provides WAI-ARIA support for assistive technologies (WAI-ARIA stands for Web Accessibility Initiative-Accessible Rich Internet Applications).