An integrated threat protection solution designed to detect, investigate, and respond to cyber threats across Microsoft 365 services.
Yep - you can use Outlook on the web (Outlook.com) directly in your web browser instead of the desktop app, which keeps your emails stored in the cloud and saves your computer's storage space.
Go to Outlook.com or Office 365 Outlook to use the exact same Microsoft Outlook interface inside any browser (like Safari, Chrome, or Edge).
Details at https://support.microsoft.com/en-us/outlook/use-the-web-version-of-outlook-like-a-desktop-app
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hth
Marcin