Below are the most common causes of this issue and a list of ways you might fix it quickly.
How to Fix Outlook Spell Check Not Working
Close Outlook and then reopen it.
This is a good first step because it doesn’t take long.
A temporary glitch in the software or on your box can break the spell check functionality.
Check Outlook’s AutoCorrect options.
Spell check won’t work if something is misconfigured or turned off.
Go toFile>Options>Mailto review these prefs.
Change the proofing language.
A language variation could make it seem as though the spell check tool is malfunctioning correctly.
For instance, UK English and US English spell many words slightly differently.
Go toFile>Options>Languagesection to see how your app is set up.
Run spell check manually.
Enter multiple misspelled words into a new message, then selectReview>Spelling and Grammar.
This lets you see if spell check is working at all.
look to see if spell check ignores certain parts of your emails.
Go toFile>Options>Mailand clear theIgnore original message text in reply or forwardoption.
Open Outlook in Safe Mode.
If spell check is fixed in Safe Mode, uninstall any recently added add-ins.
They are the most likely reason spell check doesn’t work.
There might be an update from Microsoft that fixes whatever problem is causing spell check not to work.
If there’s a bigger problem at play, repairing the program should fix it.
This should be the fix if none of the above has worked.
SelectAlways check spelling before sending.
To check an email manually, go toReview>Spelling and Grammarwhile writing the message.
Tofix Outlook when it’s not sending emails, try opening the stuck email in Drafts and resending.
You may need to use the Outlook Repair tool if you’re still having issues.
ChooseApply Current View to Other Mail Foldersto keep your changes across all mail folders.
