How to Fix Microsoft Outlook Stuck on Updating Inbox on Windows 11

Microsoft Outlook is one of the most reliable email clients for both personal and professional use. But sometimes, you may notice it gets stuck on “Updating Inbox” or “Synchronizing folders”, and your emails just won’t refresh. This issue can be frustrating — especially when you’re waiting for an important message.

Don’t worry — this is a common problem and can usually be fixed with a few simple steps. In this guide, we’ll walk you through how to fix Microsoft Outlook stuck on “Updating Inbox” on Windows 11, covering both common causes and step-by-step solutions.

Why Outlook Gets Stuck on “Updating Inbox”

Outlook may fail to sync your emails or stay stuck on updating because of one or more of these reasons:

Poor or unstable internet connection.
Corrupted Outlook data files (OST/PST).
Add-ins interfering with synchronization.
Outdated Outlook or Office version.
Corrupted mail profile.
Large mailbox size or old cache data.
Server or account configuration issues.

Now, let’s go through each method to fix the issue.

Step 1: Check Your Internet Connection

Before diving into deeper fixes, make sure Outlook isn’t simply failing to connect to the mail server.

Open your browser and visit any website to confirm your internet is working.
If you’re on Wi-Fi, try switching to a wired connection.
Restart your router if the connection seems unstable.

Tip: If Outlook works fine on mobile but not on your PC, your PC’s connection or proxy settings may be the culprit (see Step 7).

Step 2: Restart Outlook and Your PC

Sometimes, Outlook processes get stuck in memory. Restarting can help clear them.

Close Outlook completely.
Open Task Manager (Ctrl + Shift + Esc).
Under the Processes tab, locate and select OUTLOOK.EXE.
Click End Task.
Restart your computer, then open Outlook again.

Check if it now updates your inbox normally.

Step 3: Disable Offline Mode

If Outlook is accidentally set to Work Offline, it won’t sync new messages.

Open Outlook.
Go to the Send / Receive tab.
Check if Work Offline is highlighted.
If yes, click it once to disable offline mode.

Once reconnected, you should see Connected to: Microsoft Exchange or Connected in the bottom status bar.

Step 4: Update Outlook and Office

Running an outdated version of Outlook can cause syncing issues — especially if Microsoft has fixed known bugs in recent updates.

Open Outlook.
Go to File → Office Account → Update Options → Update Now.
Wait for Office to download and install updates.
Restart Outlook after the update completes.

If your Office installation is managed by an organization, make sure you have admin permissions or contact your IT admin.

Step 5: Disable Problematic Add-ins

Add-ins can slow down Outlook or cause it to hang while syncing your inbox.

Open Outlook in Safe Mode:
- Press Windows + R, type: outlook /safe and press Enter.
If Outlook runs fine in Safe Mode, one of your add-ins is likely the problem.
To identify it:
- Go to File → Options → Add-ins.
- Click Go next to Manage COM Add-ins.
- Uncheck all add-ins and click OK.
Restart Outlook normally.
Re-enable your add-ins one by one to find the culprit.

Common offenders include CRM integrations, antivirus add-ins, and outdated calendar extensions.

Step 6: Repair the Outlook Data File (OST or PST)

If your local Outlook data file is corrupted, Outlook can freeze on “Updating Inbox.”

Close Outlook.
Press Windows + E to open File Explorer.
Navigate to: C:\Users\<YourUserName>\AppData\Local\Microsoft\Outlook\
Locate the .ost or .pst file for your account.
Run Microsoft’s built-in repair tool:
- Go to: C:\Program Files\Microsoft Office\root\Office16\ (The path might vary depending on your Office version.)
- Double-click SCANPST.EXE.
Click Browse, select your Outlook data file, and click Start.
If errors are found, click Repair.

Once complete, restart Outlook — the sync process should work again.

Step 7: Reset Network or Proxy Settings

If you’re behind a corporate network or VPN, your proxy settings might prevent Outlook from connecting to the mail server.

Press Windows + R, type: inetcpl.cpl and press Enter.
Go to the Connections tab → click LAN Settings.
Uncheck Use a proxy server for your LAN (unless required).
Click OK.

You can also try resetting your network stack:

Open Command Prompt (Admin).
Run these commands one by one: netsh winsock reset netsh int ip reset ipconfig /flushdns
Restart your PC and open Outlook again.

Step 8: Rebuild Outlook’s Send/Receive Groups

If Outlook’s sync group is corrupted, rebuilding it can fix the updating issue.

In Outlook, go to Send / Receive → Send/Receive Groups → Define Send/Receive Groups.
Select your group (usually All Accounts) and click Edit.
Ensure your account is selected and that Inbox is checked.
Click OK, then Close.
Press F9 or click Send/Receive All Folders to test it.

Step 9: Create a New Outlook Profile

A corrupted mail profile can cause sync and connection issues. Creating a new one often resolves it.

Close Outlook.
Press Windows + R, type: control mlcfg32.cpl and press Enter.
Click Show Profiles → Add.
Enter a name for the new profile and follow the steps to add your email account.
After adding, select Always use this profile, then choose your new one.
Launch Outlook — it will rebuild your inbox and folders.

Step 10: Check Your Mail Server Status

Sometimes, the issue isn’t on your end. If you use Outlook with Microsoft 365, Exchange, or Outlook.com, the mail server may be experiencing downtime.