By default, the spell checking option is turned off in Outlook Web Access (OWA). If you prefer to use the Firefox web browser instead of Internet Explorer, an integrated spell checker will underline suspected words. To use this integrated spell checker, right-click on any word underlined with a red indicator. Select the appropriate spelling from the list to replace the word.
If you prefer to enable the Outlook Web Access (OWA) spell checker (recommended for individuals using Internet Explorer), find and click on Options in the upper right-hand corner of the OWA window.
Select Settings from the list on the left of the window, and then Spelling from the tabs running across the top of the screen.
Check the box indicating Always check spelling before sending
Select the desired dictionary from the Use this dictionary to check spelling drop down menu
Click Save at the bottom of the page and return to My Mail (upper right-hand corner)
To verify that the settings saved, create a new email with spelling mistakes. Select the Spell Check Icon on the OWA Toolbar, and it should underline the misspelt words.
If the email is ready to be sent, you can also click the Send button. If there are any spelling mistakes, you should receive the following message:
Follow the directions given to fix the misspellings.