How to fix Outlook desktop app not showing new emails or failing to update the inbox

Summary

This guide helps you troubleshoot and resolve: How to fix Outlook desktop app not showing new emails or failing to update the inbox. Follow the steps below to fix the issue.

Common Causes

If your Microsoft Outlook desktop app is stuck on an old inbox view, not showing new messages, or simply failing to refresh, the cause is usually a stuck connection, a corrupted view, or a sync issue with the mail server. The steps below walk you through the most common fixes, starting with the quickest and moving toward more thorough solutions.

Quick Fix Steps

Try these steps first. Most inbox refresh issues are resolved within a few minutes using one of these methods.

1. Click the Send/Receive tab, then click Send/Receive All Folders (or press F9).
2. Check the status bar at the bottom of Outlook. If it shows Working Offline, click it once to switch back online.
3. Restart Outlook completely. Right-click the Outlook icon in the system tray and choose Close, then reopen the application.
4. If the issue persists, restart your computer.

If new emails are still not appearing, continue to the detailed troubleshooting steps below.

Detailed Instructions

1. Confirm You Are Connected to the Internet

Outlook needs an active internet connection to pull new mail from the server. Open a web browser and visit any website to confirm your connection is working. If other devices on the same network are also offline, the issue is with your internet service rather than Outlook itself.

2. Check Outlook Is Not in Offline Mode

1. Open Outlook.
2. Look at the bottom-right corner of the status bar.
3. If you see Working Offline, click that text in the status bar to toggle Outlook back online. Alternatively, go to the Send/Receive tab and click Work Offline to turn off offline mode.

3. Force a Manual Send/Receive

1. Click the Send/Receive tab.
2. In the Send & Receive group, click Send/Receive All Folders.
3. Alternatively, press F9 on your keyboard.

4. Verify the Email Account Is Connected

An account that has lost its connection to the mail server will stop syncing new mail. To check:

1. Click File in the top-left corner.
2. Under Account Information, look for any error messages under your email account, such as Disconnected or Need Password.
3. If an issue is shown, click the account and choose Repair or Update Password and follow the prompts.

5. Restart the Outlook Process

Outlook runs a background process called Outlook.exe that handles mail delivery. Restarting it can clear stuck sync jobs.

1. Right-click the Outlook icon in the Windows system tray (near the clock) and choose Close.
2. Open Task Manager by pressing Ctrl + Shift + Esc.
3. Under the Processes tab, look for any remaining Outlook.exe entries and end them.
4. Reopen Outlook and let it sit for a few minutes to resync.

6. Clear and Rebuild the Inbox View

If Outlook is connected but the Inbox still shows old messages, the view itself may be cached incorrectly.

1. Click the Inbox folder.
2. Click the View tab.
3. Click Change View and switch to a different view, such as Compact.
4. Switch back to your original view (commonly Messages).
5. Press F5 to refresh.

7. Check the Cached Exchange Mode Setting

If you use a Microsoft 365, Exchange, or Outlook.com account, Outlook downloads a local copy of your mailbox. If this cache becomes corrupted, new mail may not appear.

1. Click File, then Account Settings, then Account Settings again.
2. Select your email account and click Change.
3. Under Cached Exchange Mode, confirm that Use Cached Exchange Mode is ticked.
4. Click More Settings, then the Advanced tab.
5. Click Download shared folders to refresh the local cache, then confirm.
6. Restart Outlook.

8. Disable Add-ins

A faulty add-in can interfere with Outlook's ability to sync. To test this:

1. Click File, then Options, then Add-ins.
2. At the bottom of the window, change Manage to COM Add-ins and click Go.
3. Untick all add-ins and click OK.
4. Restart Outlook and check whether new mail appears.
5. If the issue is resolved, re-enable add-ins one at a time to identify the culprit.

9. Repair the Outlook Data File

For POP and IMAP accounts, Outlook stores mail locally in a .pst file. For Microsoft 365 and Exchange accounts, it uses an .ost file. Corruption in these files can prevent new mail from being delivered.

1. Close Outlook.
2. Open the Windows Control Panel.
3. Go to Programs, then Programs and Features.
4. Locate Microsoft Office or Microsoft 365 in the list and click it.
5. Click Change, then choose Online Repair.
6. Follow the prompts and restart your computer when finished.

10. Create a New Outlook Profile

If the above steps have not worked, your Outlook profile may be corrupted. A new profile can be created without losing your existing mail, which remains on the server.

1. Close Outlook.
2. Open the Control Panel and search for Mail (Microsoft Outlook).
3. Click Show Profiles, then click Add.
4. Enter a name for the new profile and follow the prompts to add your email account.
5. Under Always use this profile, select the new profile.
6. Click OK and open Outlook.

Troubleshooting

New mail arrives on webmail but not in Outlook

This confirms the issue is with Outlook or your local configuration, not the mail server. Focus on the cached mode settings, add-ins, and data file repair steps above.

Outlook shows "Trying to connect" or "Disconnected"

This usually points to a network or authentication issue. Confirm your internet is working, then verify your password by signing into your mailbox through a web browser. If your password has expired, update it in Outlook via File > Account Settings.

Only some folders are not updating

Right-click the affected folder and select Properties. On the General tab, confirm that the folder is not set to show only items from a specific date range or that the folder is not filtered. You can also right-click the folder, choose IMAP Folders (for IMAP accounts), and select Reset to resynchronise the folder with the server.

New mail is delayed by several minutes

Outlook checks for new mail at set intervals. To change this, go to File > Options > Advanced > Send and Receive. Under When Outlook is online, adjust the schedule or click Send/Receive All Folders to perform an immediate check.

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