This article is for Outlook Web App, which is used by organizations that manage email servers running Exchange Server 2013 or 2010. If you're using Office 365 or Exchange Server 2016, your email program is Outlook on the web. For help with Outlook on the web, see Get help with Outlook on the web.
Options in Outlook Web App
You can customize Outlook Web App using the settings available in the following options:
After you change the settings on any Options page, click Save to apply your changes.