Topics Map > Features and Functionality > Client Capabilities > Web (OWA)
Microsoft 365 (Outlook on the web) - Check spelling before sending a message
Spell checking is available in Internet Explorer 10 and later versions, and current versions of Firefox, Chrome, and Safari. Check the options for your web browser to learn more about how to use it to check spelling.
If you are using Outlook desktop client, you do have the ability to use spell checking feature. Learn more.