A family of Microsoft word processing software products for creating web, email, and print documents.
If there is no square bullet in the dropdown list, click Define New Bullet... at the bottom of the dropdown list.
Then click Symbol...
Select (normal text) from the Font dropdown.
Make sure that Unicode (hex) is selected in the lower right corner above the OK button, then scroll down the list of characters - near the end, you should find a square dot.