Glossary
Focused Inbox
An Outlook feature that automatically separates important mail from low-priority mail using mailbox-side machine learning.
Focused Inbox is the Outlook feature that automatically splits the inbox into two tabs — Focused (likely important) and Other (likely low-priority) — using mailbox-side machine learning trained on the user's behaviour, sender reputation, and content signals. The model is per-mailbox and adapts over time as users move messages between tabs. Available in Outlook for Windows (classic and new), Mac, web, and mobile. Successor to the older Clutter folder, which moved likely-unimportant mail to a separate folder rather than splitting the inbox. Different from Junk Email (spam filter, EOP-driven); Focused Inbox sorts mail that has already passed spam filtering.