I have a red x on my Outlook icon on taskbar and working offline shows within Outlook all the time

Question

The red x is always on the outlook icon on the taskbar? I have tried using the send/recieve in Outlook but at the bottom it always shows 'Working Offline'. I log off and restart Outlook and it still does not work? Even rebooting my laptop it still shows the red x and within Outlook it shows working offline?

I have checked all my mailboxes they are not full so plenty of space so what's going on

Answer 1

Hello david carey,

Welcome to Microsoft Q&A! I understand how worrying it is to see that Red X on your Outlook icon, especially when you know your internet connection is working fine.

Since you have already tried toggling the "Work Offline" button and restarting the computer without success, this usually indicates that your Outlook Profile or the Local Data File (.ost) has become corrupted. Essentially, Outlook is having trouble reading the file that stores your email on the computer, so it defaults to "Offline" mode to protect the data.

Here are the steps to fix this corruption and get you back online.

Step 1: Create a new Outlook Profile

This is often the most reliable fix because it forces Outlook to build a completely fresh connection to the server without deleting any of your actual emails.

1. Close Outlook completely.
2. Open the Control Panel on your laptop (you can search for "Control Panel" in the Windows Start menu).
3. Search for and click on Mail (Microsoft Outlook).
4. Click the Show Profiles... button.
5. Click Add... and give the new profile a name (e.g., "OutlookNew").
6. Follow the prompts to add your email account again (the auto-setup usually works fine).
7. Important: Once finished, go back to the "Mail" window and change the setting at the bottom "Always use this profile" to your New Profile Name.
8. Click Apply and open Outlook to see if the Red X is gone.

Step 2: Rebuild the Data File (.OST)

If you prefer not to create a whole new profile, you can force Outlook to replace the specific file that is likely corrupted.

1. Close Outlook.
2. Press the Windows Key + R on your keyboard to open the Run box.
3. Paste this path and press Enter:

%localappdata%\Microsoft\Outlook

4. You will see a list of files. Look for the one ending in .ost (it will usually look like ******@address.ost).
5. Do not delete it (just to be safe). Instead, right-click it and Rename it to old (e.g., your-email.ost.old).
6. Restart Outlook.

Note: Outlook will notice the file is missing and automatically start downloading a fresh, non-corrupted copy from the server.

Step 3: Check for interfering Add-ins (Safe Mode)

Sometimes an antivirus or PDF add-in can "lock" the connection, preventing Outlook from going online.

1. Close Outlook.
2. Press Windows Key + R.
3. Type outlook.exe /safe and press Enter.
4. If Outlook opens and says "Connected" (no Red X), then an add-in is the cause.
5. To fix it, go to File > Options > Add-ins, click Go next to "COM Add-ins," and uncheck your add-ins one by one to find the culprit.

Please let me know if one of these steps gets you reconnected!

Best regards,

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