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0x80040900 Outlook Error: 6 Ways to Easily Fix It

Repair the PST file to send and receive mail

5 min. read

Updated onNovember 10, 2023

updated onNovember 10, 2023

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Key notes

The Outlook error 0x80040900 is a common error when an email cannot be sent. You can access your emails using the web version, but the app just fails.

This can happen due to various reasons, such as theemail account is not configured properlyor there being a problem with the server. If you want to fix it immediately, this article will help you.

What is the error message 0x80040900?

Outlook is one of the most used email clients in the world. This does not mean it is devoid of issues. The Outlook error 0x80040900 is one of the most pressing issues because you can neither send nor receive emails.

It’s important to note that this problem can happen with any version of Outlook. If you’ve been wondering why you are the recipient of such an error message, below are some possible reasons:

How do I fix error code 0x80040900?

Try the following first before any complex solutions:

1. Scan for viruses

2. Disable your antivirus temporarily

3. Repair Microsoft Office

4. Start Outlook in Safe Mode

5. Create a new Outlook profile

While this step doesn’t fix the issue, it will help uncover whether there’s an issue with your current profile. If it works, you can confirm that it is corrupted and move ahead with configuring the new one as the default email profile.

This will disable any add-ins or plugins that might be causing the problem. If this fixes your issue and your mail starts working again, you’ll need to figure out which add-in or plugin is causing it. You can do this by disabling each individually until you find the culprit.

6. Repair the PST file

If this sounds like a lengthy procedure, you’ll be happy to know a third-party tool can repair the PST file for you.

⇒Get Stellar Repair for Outlook

You may also be interested in how torebuild your Outlook profile, so check out the full details from our comprehensive guide.

For any further suggestions, leave a comment down below.

0x80040900 Outlook Error: 6 Ways to Easily Fix It#

What is the error message 0x80040900?#

How do I fix error code 0x80040900?#

1. Scan for viruses#

2. Disable your antivirus temporarily#

3. Repair Microsoft Office#

4. Start Outlook in Safe Mode#

5. Create a new Outlook profile#

6. Repair the PST file#