adding words to dictionary

Hi @Tony Blackburn

At the same time will update in both word and outlook.

Method 1 — Right‑click the word

Type the word

Right‑click the red‑underlined word

1. Select Add to Dictionary

That’s it — now Outlook emails will also stop marking it as wrong.

Method 2 — Add via Outlook settings

1. Open Outlook
2. Go to File → Options
3. Select Mail
4. Click Spelling and Autocorrect
5. Click Proofing
6. Click Custom Dictionaries
7. Select CUSTOM.DIC
8. Click Edit Word List
9. Add your word → Add → OK

Add a word manually to the dictionary file

If you want to add many words:

Press Win + R

Type:

Code

%appdata%\Microsoft\UProof

Open CUSTOM.DIC

Add your words (one per line)

1. Save

Thanks.

Hi,

It is not clear, I am afraid, whether you are seeking help for New Outlook or Classic Outlook.

Classic Outlook

In Classic Outlook for Microsoft 365, to add a word to the dictionary:

• Open a new email and type the word.
• Right-click the word that is underlined in red.
• Select Add to Dictionary.

If you want to manage the custom dictionary:

• Go to File > Options > Mail > Spelling and AutoCorrect.
• Select Proofing > Custom Dictionaries.
• Select CUSTOM.DIC and click Edit Word List to add or remove words manually.

New Outlook

In New Outlook, when a word is flagged as misspelled, right-click it and select Add to dictionary. This adds the word to your custom dictionary. There is no equivalent of Custom Dictionary addition, although.

I hope this information helps. If you have any more questions, don't hesitate to reach out. Wishing you good luck!