Configuring preferences and options in Outlook.com
Hi!
You mentioned HTML, but those options are not available in Outlook Web/New (the version of Outlook in the category you selected). Therefore, it is important to know exactly which version of Outlook you are using.
Are you accessing the website [https://outlook.live.com/mail/], the "New Outlook," or "Outlook Classic"?
You can try to distinguish between them by looking at the icon.
- Outlook Classic
- New Outlook