Change the Priority of a Message in Microsoft Outlook

Sometimes an email is a gentle tap on the shoulder. Sometimes it’s a fire alarm. And sometimes it’s… a fire alarm about someone forgetting to attach a PDF. (We’ve all lived through that drama.)

Microsoft Outlook lets you change a message’s prioritywhich Outlook labels more precisely as Importanceso recipients can see at a glance whether your note is urgent (“High”) or informational (“Low”). Used well, it’s a helpful signal. Used badly, it’s the email equivalent of shouting “EMERGENCY!” because the office ran out of oat milk.

This guide walks you through how to set, change, and automate message priority across Outlook for Windows, Outlook for Mac, Outlook on the web (Microsoft 365 and Outlook.com), and what to do when the mobile app refuses to give you the button you swear should exist.

Priority vs. Importance vs. Flags: Outlook’s Three-Lever Dashboard

Before we start clicking buttons, let’s translate the lingobecause Outlook has multiple ways to say “pay attention,” and they’re not the same thing.

1) Importance (a.k.a. “Priority” in everyday speech)

This is the one you came for: High, Normal, or Low. It adds a visible indicator (like a red exclamation mark for High or a down arrow for Low) in many email clients. It’s a signalnot a magical spell that forces anyone to read your email.

2) Flags (Follow Up)

Flags are task-oriented. They can remind you to follow up, and in some cases you can also flag for recipients to indicate a deadline. Flags are great for workflow; they’re not the same as Importance.

3) Sensitivity / Labels (Private, Confidential, etc.)

Sensitivity settings and sensitivity labels (in organizations that use them) are about how information should be handled, protected, or classified. They don’t mean “urgent.” Don’t confuse “Private” with “High importance” unless you want your teammates to think you’ve started emailing state secrets about next Thursday’s potluck.

What “High Importance” Actually Does (and What It Definitely Does Not)

Setting Importance to High or Low changes a message property that other email programs can display in the list view and/or message header. Many recipients can also sort or filter by importance. That’s the practical win: it helps your email stand out while someone is triaging their inbox.

What it does not do:

• It doesn’t bypass Focused Inbox, spam filters, Quiet Hours, or Do Not Disturb settings.
• It doesn’t create a guaranteed pop-up alert (unless the recipient has rules/notifications set up).
• It doesn’t make your email “top of the stack” for people who already have 347 high-importance emails.

Think of Importance like a sticky note on the outside of an envelope. Helpful? Yes. Binding contract? No.

How to Set Message Priority in Outlook for Windows (Classic Desktop App)

If you’re using classic Outlook for Windows (the long-standing desktop app), setting priority is straightforwardand the buttons are usually right where you’d expect them to be.

1. Click New Email to start a message.
2. On the ribbon, find the Tags group (often on the Message tab).
3. Click High Importance (usually a red exclamation icon) or Low Importance (usually a down arrow).
4. To return to normal priority, click the highlighted button again or choose the opposite button until neither is selected (behavior can vary slightly by build).

Quick reality check: use cases that won’t annoy your coworkers

• High importance: “Payroll cutoff today at 3 PM,” “Security incident steps,” “System outage update.”
• Low importance: “FYI: meeting notes,” “Optional reading,” “Weekly newsletter / digest.”

Pro tip: even when you mark High importance, your subject line and first sentence still do the heavy lifting. “URGENT” with no context is just… vibes.

How to Set Priority in New Outlook for Windows

The “new Outlook” for Windows has a more modern interface, and Microsoft occasionally adjusts where commands live. But the concept is the same: you’re setting the message’s Importance.

In many layouts, you’ll find it like this:

1. Click New mail (or New message).
2. Look for an Options area or a More menu (often shown as …).
3. Select Set importance and choose High, Normal, or Low.

If you don’t see it immediately, don’t assume you’re losing itOutlook sometimes hides less-used controls behind the overflow menu. If your organization manages Outlook settings centrally, some options may also be limited.

How to Set Priority in Outlook for Mac

On macOS, Outlook supports setting message Importance from the compose window.

1. Create a new message (or reply/forward).
2. On the compose ribbon, find Tags (or an Options area depending on your version).
3. Select High Importance or Low Importance.

If your ribbon looks minimalist, expand it or check an overflow menu. Outlook for Mac is very fond of hiding useful things until you prove you deserve them.

How to Set Priority in Outlook on the Web (Microsoft 365 / Outlook.com)

The web versionsOutlook on the web (for Microsoft 365 work/school accounts) and Outlook.com (personal accounts)typically use a “more actions” menu in the compose window.

1. Click New message.
2. At the top of the compose window, click the … (More actions).
3. Select Set importance.
4. Choose High, Normal, or Low.

This is also one of the easiest ways to set priority on a phone if the mobile app doesn’t cooperateopen Outlook on the web in a browser and set importance there.

Outlook Mobile (iOS/Android): Why You Can’t Find the Button

If you’re using the Outlook mobile apps on iOS or Android and you can’t find “High Importance,” you’re not missing a secret setting. According to Microsoft’s own support documentation, adding priority/importance while composing is not currently supported in the Outlook mobile apps.

What you can do instead:

• Use Outlook on the web in your browser (Microsoft 365 or Outlook.com), then set importance there.
• Send from desktop when importance really matters (incident response, compliance deadlines, etc.).
• If it’s truly urgent and time-sensitive, consider a channel designed for urgency (Teams, phone call, pager system, whatever your organization uses), because emailhigh importance or notstill requires someone to check email.

How to Change the Priority of a Message You Received (Yes, Really)

Here’s a surprisingly underused trick: in classic Outlook for Windows, you can change the importance of an email you’ve receivedessentially re-labeling it for your own workflow.

Important caveat: this changes your copy of the email. It does not reach back through time and scold the sender for marking “Lunch plans” as High importance.

1. Double-click the message to open it in its own window (not just the Reading Pane).
2. In the ribbon’s Tags group, click the small Message Options dialog launcher (tiny arrow).
3. Use the Importance drop-down to choose High, Normal, or Low.
4. Close the message and choose Yes when Outlook asks if you want to save changes.

When changing received importance is genuinely useful

• You’re tracking a time-critical vendor thread and want it to stand out in list view.
• You’re triaging a shared mailbox and need quick visual signals for the team.
• You want to downgrade “high importance” noise so it stops hijacking your attention.

Automate Priority with Rules (Make Outlook Do the Boring Part)

If you’re constantly hunting for key messages, rules are your best friend. Outlook rules can automatically change the importance level of messages based on conditions like sender, keywords, or recipient.

Rule idea #1: Mark emails from your boss (or a key client) as High importance

This doesn’t change what your boss sends; it changes what you see. It’s basically a VIP filter without needing a velvet rope.

Rule idea #2: Mark automated newsletters or alerts as Low importance

Great for reducing “alert fatigue,” especially if a system insists on emailing you every time it successfully does the thing it’s supposed to do.

How to set a rule in Outlook on the web (common path)

1. Open Outlook on the web.
2. Click Settings (gear icon), then View all Outlook settings.
3. Go to Mail > Rules.
4. Click Add new rule.
5. Choose conditions (for example, “From” = a person, or “Subject includes” = a keyword), then set the action to mark with importance.
6. Save your rule and keep an eye on it for a week to make sure it isn’t overeager.

Note: many organizations emphasize caution with rules that delete messages automatically. “Move to a folder” is usually safer than “Delete forever and hope for the best.”

Set a Default Importance Level (Use With Caution)

Outlook can be configured to start new messages with a default importance level. This can be handy if you routinely send low-stakes FYI updates and want them to be marked Low by default.

In classic Outlook for Windows, the setting is commonly found here:

1. Go to File > Options.
2. Select Mail.
3. Scroll to the Send messages section.
4. Set Default importance level to High, Normal, or Low.

Two warnings before you get fancy:

• If you set everything to High, you’ve basically invented a new kind of “Normal” that annoys your recipients and trains them to ignore the indicator.
• In some managed environments, IT policies (including Group Policy settings) can disable or lock certain Outlook options.

Can You Change Priority After Sending?

Not directly. Once the email is sent, you can’t simply “edit” the message in the recipient’s inbox and switch it from Normal to High. Email doesn’t work like shared Google Docs (thank goodness, because then we’d have “live edits” to apology emails).

What you can do:

• Resend the message (useful if you need to correct recipients, attachments, oryesimportance).
• Recall or replace the message in some work/school environments where both sender and recipient are in the same organization on Microsoft 365 or Exchange. Recall has requirements and doesn’t always succeed, but it’s an option.
• Send a short follow-up: “Correction: This should be high importance because deadline is today at 3 PM.” (Short, factual, and merciful to everyone’s inbox.)

Best Practices for Using High vs. Low Importance (So People Take You Seriously)

High importance: earn it

• Use it sparinglythink deadlines, outages, approvals needed today, compliance requests.
• State the action and the time in the first line.
• Keep it short or front-load the summary, because urgency plus a wall of text is a cruel combo.

Example: Subject: “Approval needed today (3 PM): Q1 vendor renewal”

First line: “Please approve the renewal by 3 PM today so we don’t lapse service.”

Low importance: your friend for FYIs and recurring updates

• Weekly status updates
• Meeting notes
• Optional training invites
• Background reading

Example: Subject: “FYI (low importance): Meeting notes + action items”

Combine importance with better inbox hygiene

• Use descriptive subject lines (who/what/when).
• Use bullets for requests and deadlines.
• Use flags for follow-up tasks (especially for yourself).
• Consider rules to elevate truly critical senders/messages automatically.

Troubleshooting: When You Can’t Find the Priority Controls

“I don’t see High Importance anywhere.”

• You’re on mobile: the Outlook iOS/Android apps may not support setting importance while composing.
• You’re not in a compose window: importance controls show while writing (or in a full message window for received-mail edits).
• The ribbon is simplified: check the overflow menu (…) or expand the ribbon.
• Reading Pane limitation: you can’t change importance of a received email while it’s only previewed in the Reading Pane.
• Org-managed settings: some options may be restricted by IT policy.

“I marked it High, but nobody reacted.”

Sadly, Outlook can’t force urgency into someone else’s priorities. If it’s a true escalation, use the communication channel your team treats as urgent (Teams call, phone, incident tool) and reserve High importance email for when it supportsnot replacesthose workflows.

Conclusion

Changing the priority of a message in Microsoft Outlook is simple: set the message’s Importance to High or Low when composing, adjust a received message’s importance for your own organization when needed, and use rules to automate what matters most. The real win isn’t the iconit’s the clarity: the right messages stand out, and everything else stops pretending it’s an emergency.

Bonus: from the Inbox Trenches (Real-World Patterns That Actually Help)

In real workplaces, “High importance” tends to go through the same lifecycle as any other productivity tool: it starts as a helpful signal, then gets overused, then everyone stops caring, and finally someone writes an internal wiki page titled “Please Stop Marking Everything High Importance” (usually in all caps, ironically).

The first pattern that shows up is what you might call importance inflation. One person uses High importance for a genuine deadline. It works. Then they use it again. And again. Eventually, their emails all look like an emergency broadcast system test. Recipients learn to scan the subject line for the real story and mentally ignore the red exclamation point. The fix is surprisingly human: treat High importance as a scarce resource. If you only use it when action is required today (or when there’s real operational risk), people keep trusting it.

The second pattern is that priority works best when paired with one clean ask. A high-importance email that says “Thoughts?” is basically a smoke alarm with no exit plan. A better structure is: (1) what happened, (2) what you need, (3) by when, and (4) what happens if it’s late. That sounds intense, but you can do it in two lines: “Please approve by 3 PM. If we miss it, the renewal slips to next week and we risk service interruption.” Now the urgency is understandable rather than theatrical.

Third: many people try to use importance as a substitute for better routing. If a message needs attention from one specific person, sending it to 22 people and marking it High importance is a recipe for diffusion of responsibility (“Surely someone else will handle it”). In those cases, it’s often better to email the owner, CC only essential stakeholders, and use a crisp subject line. If you do need the group, name the owner explicitly in the first sentence: “Alex, can you approve this today?”

Fourth: low importance is wildly underrated. Teams that send recurring updates marked Low importance often get more engagement, because recipients don’t feel ambushed. People read it when they’re in “information mode,” and you avoid training everyone to treat all email as a crisis. If your updates are valuable, low importance plus a consistent subject format (“Weekly Ops Update Feb 2026”) builds trust and habit.

Finally, automation is where Outlook quietly shines. Instead of relying on senders to correctly label importance, create rules that elevate what matters (VIP senders, project keywords) and downgrade noisy sources. This flips the model from “everyone must behave perfectly” to “my inbox is optimized for reality.” And reality, as we know, includes at least one person who marks “Happy Birthday!” as High importance. Bless them. But also: rule it to Low.