How to Let Copilot Prioritize Your Outlook Inbox

Official documentation checked October 14, 2026.

Copilot’s Prioritize my inbox feature assigns importance to incoming messages and explains its reasoning. Focused Inbox is a separate Outlook feature that divides mail into Focused and Other. Turning on Focused Inbox does not activate Copilot prioritisation.

Choose the feature that matches your goal: Copilot priorities for an explanation of what may need attention, Focused Inbox for a two-tab view, or Outlook rules for an explicit filing action.

How Copilot Prioritises Your Outlook Inbox

Microsoft’s Outlook Copilot FAQ identifies Prioritize as a capability available with a Microsoft Copilot work license. Confirm the signed-in mailbox, client, entitlement, and rollout with your administrator if the option is missing. The title “Outlook for Microsoft 365” alone is not proof every account receives the feature.

The Prioritize guide describes high, normal, and low priorities for eligible new Inbox messages, with summaries and reasons. Priorities are suggestions to help you review mail; they do not replace reading urgent correspondence or following a deadline process.

Focused Inbox is available through its own account/client support and does not require a Copilot license simply to create Focused and Other tabs. Microsoft’s Focused Inbox instructions describe that separate feature.

Steps to Enable and Use Copilot Prioritize

1. Find the actual Prioritize option. Microsoft’s Windows instructions use the arrow next to the Copilot button at the top right, then Prioritize. On mobile, use Settings > Copilot > Set up Prioritize by Copilot. Follow the setup shown in your client; availability is being rolled out.
2. Give a specific priority instruction. For example, use a criterion such as “High priority: messages from our key customer about a delivery delay.” Keep criteria tied to your responsibilities. This is an example to adapt, not a guarantee that every relevant message will be detected.
3. Review new mail after setup. Use the priority indicator and reason to decide what to read first. Check whether the message really needs your action and whether the summary reflects the original. The feature does not retroactively reprioritise older messages.
4. Refine the criteria. Review Settings > Copilot > Prioritize for supported customisation. Give clear descriptions of the sender, topic, or project that matters. Test changes on subsequently received mail, not on an old message whose existing priority will remain unchanged.
5. Use the available priority filter or sort. When supported, review high-priority messages together. Then return to the broader Inbox and any relevant folders to catch messages outside that view. A priority-only filter is a view, not evidence that the rest of your mail is unimportant.

A useful evaluation is a short review log: note the message category, assigned priority, explanation, and your own judgment. Include a missed important message and an unnecessarily high-priority message when refining criteria. Do not infer that ignoring a message explicitly teaches Copilot it was classified correctly.

Common Mistakes and Limitations to Avoid

Nothing changes in old mail: this can be expected because Prioritize applies to messages received after enabling it, and criterion changes affect future mail. Check a newly received eligible message before assuming setup failed.

Some messages have no priority assessment: the guide excludes certain message types and mail delivered outside the Inbox, including messages moved to a subfolder by a rule. Review important project folders and calendar requests separately. Do not remove protective rules or encryption merely to make mail eligible for AI assessment.

Focused and Other are visible but no Copilot priority appears: those tabs confirm Focused Inbox, not Prioritize. For classic Outlook, View > Show Focused Inbox controls the tabs. Use its Move or Always move options for tab placement; those options are not a substitute for Copilot priority instructions.

You want one ordinary message list: use the documented Focused Inbox on/off control for your client. Do not assume a ribbon “Filter > All” command merges the two tabs in every Outlook version. Recheck active filters when a message seems missing.

Copilot Priorities, Focused Inbox, and Rules Compared

For example, keep a daily check of a customer-case folder even if a rule moves that mail out of the Inbox. Use Copilot priorities to help choose what to read next, then verify the original message before responding. No single sorting feature is a complete inbox review.