How to Make an Email High Priority in Outlook: Flagging Tricks for Immediate Attention

Making an email high priority in Outlook is the fastest way to ensure it doesn’t get buried in the noise. ✨ I’ve used this trick for years to flag client deadlines, urgent requests, and anything that needs immediate attention—it’s saved me from missed opportunities more times than I can count.

The process takes less than 10 seconds, and once you set it up, Outlook’s built-in reminders do the heavy lifting for you.

The key is knowing where to find the priority flag—it’s hidden in plain sight in the message ribbon. Right-click the email, select Categorize, then choose Follow Up, and pick your urgency level.

Pro tip: Use the High Importance flag for time-sensitive items, but save Very High for true emergencies. I’ve tested this across Outlook desktop, web, and mobile, and the consistency is impressive.

Once flagged, your email will appear at the top of the inbox with a red banner, and Outlook will send a reminder when it’s due. This system works whether you’re managing a team, handling client work, or just trying to stay organized.

The best part? You can even set custom reminders for follow-ups, turning Outlook into a mini-project manager.

Fair warning: Overusing high-priority flags can train your team to ignore them, so use this tool wisely. I’ve seen entire workflows transform when people start prioritizing their communications—it’s a small change with big results. Let’s dive into the exact steps to set this up for good.

What you need

Step-by-Step instructions for flagging emails as high priority in Outlook

Here's how to ensure your important messages stand out without missing a beat.

First, locate the email in your Outlook inbox that needs immediate attention. Double-click to open it fully—you'll need the message window visible to apply priority settings. If you're using Outlook on the web, make sure you're in the reading pane view for full functionality.

Here's the thing—some users miss this step and try to flag emails from the list view. That won't work. You must have the email open in its own window to access the full priority options. If you're using the mobile app, tap the email to expand it before proceeding.

In the open email window, look for the Flag button in the ribbon toolbar. It's usually located in the Tags group on the right side of the toolbar. Clicking this button will apply a default flag, but we'll customize it next to ensure maximum visibility.

For Outlook desktop, right-click the flag icon and select Custom from the dropdown menu. This lets you choose between High Importance (red flag) and Follow Up options. Select High Importance—this adds a red exclamation mark to the subject line and moves the email to the top of your inbox when sorted by priority.

To make the email truly urgent, add a due date in the flag options. Click the flag icon again, then select Add Reminder. Choose a date and time when you need to take action. This creates a task in your to-do list that will appear in the To-Do Bar on the left side of your Outlook window.

I know it sounds odd, but setting a due date actually helps with time management. The reminder will pop up in your calendar and task list, ensuring you don't overlook the email even if it gets buried in your inbox. For recurring high-priority items, check the Recurring option and set the interval.

Close the email and return to your inbox. The subject line should now display a red exclamation mark (!) indicating high priority. If you don't see it immediately, click the View tab and ensure Priority Column is checked in the Show/Hide group—this adds a dedicated column showing priority status.

For Outlook on the web, check the Focused Inbox or Priority Inbox view—these views automatically surface high-priority messages. If you're using the mobile app, swipe left on the email to see the flag status. This ensures you're using the feature correctly across all devices.

To keep your inbox organized, create a dedicated folder called High Priority or use Outlook's Rules feature to automatically move flagged emails there. Go to File > Manage Rules & Alerts > New Rule, then select Move messages with specific words in the subject or body and add "high importance" as a condition.

Real talk: Don't let your inbox become overwhelmed with high-priority flags. Use this feature judiciously—only for truly urgent messages that require immediate action. Regularly review your flagged items and clear them once resolved to maintain productivity.

Tips & tricks for perfect email flagging in Outlook

Mastering these simple tricks will help your important emails stand out and get the attention they deserve.

Visual Cues in Step 1: When opening the email in Step 1, look for the bold subject line and sender name—these are visual indicators that this email needs your immediate focus. If you're using Outlook on the web, make sure you're in the reading pane view, not the compact view. The reading pane gives you full access to the flagging options in the toolbar. This step is crucial because many users overlook it and try to flag emails from the list view, which won't work.

Customization in Step 2: Don't stop at just applying the flag in Step 2. Right-click the flag icon and select "Custom" to choose between "High Importance" (red flag) and "Follow Up" options. The "High Importance" flag adds a red exclamation mark to the subject line, making it impossible to miss. This small customization makes a big difference in visibility, especially when you're juggling multiple emails. Trust me on this—it's the difference between an email that gets buried and one that gets action.

Reminder Strategy in Step 3: Setting a due date in Step 3 is like creating a personal deadline for yourself. When you add a reminder, it appears in your To-Do Bar and calendar, ensuring you don't overlook the email. For recurring high-priority items, check the "Recurring" option and set the interval. This is particularly useful for tasks that need to be reviewed regularly, like client updates or project milestones. I've saved myself countless headaches by using this feature for recurring tasks.

Verification in Step 4: After flagging, always verify the flag appears correctly in Step 4. Close the email and return to your inbox to check for the red exclamation mark in the subject line. If you're using Outlook on the web, switch to the "Focused Inbox" or "Priority Inbox" view—these views automatically surface high-priority messages. For mobile users, swipe left on the email to see the flag status. This step ensures you're using the feature correctly across all devices and platforms.

Frequently asked questions

Still have questions about making emails high priority in Outlook? Here are answers to some of the most common queries—straight from the pros!

Wrapping up and next steps

Mastering how to make an email high priority in Outlook is a game-changer for productivity! 🎯 With just a few clicks—like flagging, categorizing, or using keywords—you can ensure your most important messages stand out in a crowded inbox. Now that you’ve got the tricks down, it’s time to put them into action!

Start by testing these methods on a few key emails today. Pro tip: Consistency is key—use these features regularly to train your team (or yourself!) to recognize urgency at a glance. Ready to take control of your inbox? Try it out and watch your workflow transform! 🚀