Outlook error an unexpected error has occurred

Many users encounter Outlook an unexpected error has occurred 0x80040154 while working with Outlook on Windows operating system. If you are also one of them then in this blog you will get the solution.

In this article, you’ll find the entire details about this 0x80040154 error code Outlook 2016, 2013, 2010, 2007, 2007, etc. You will get to know about the reasons for the occurrence of the error along with the resolution methods.

Let’s get started on!

What is this Outlook 0x80040154 Error Code Mean?

When the users try to send emails messages using MS Outlook, then ‘An unknown error has occurred, error code: 0x80040154 in Outlook 2016’ message appears. The most common cause for every Microsoft Outlook error is the PST file corruption. As we know the Outlook application stores its entire data in a PST file format. The Personal Storage Table is an Outlook data file that contains all the Outlook mailbox items like emails, contacts, calendars, tasks, journals etc.

The primary cause of this Outlook PST file error is the inetcomn.dll file. If the DLL file gets erased or lost from the Outlook program, then the .pst files become inaccessible. As a result, the Outlook data files get corrupted due to this Outlook an unexpected error has occurred 0x80040154.

Why an Error Occurred while Sending the Message 0x80040154?

Additionally, there are several other factors that are responsible for this error 0x80040154 Windows 10. Let’s have a look at them.

1. Corrupt Windows Registry File.
2. Virus attack or malicious infection on the Windows System.
3. Accidental loss or deletion of inetcomn.dll files from Microsoft Outlook.
4. Corrupt or damaged PST files.
5. PST file size exceeds its file size limit.
6. Improper installation of MS Outlook profile.
7. Incomplete configuration of Microsoft Outlook.

How to Fix Outlook an unexpected error has Occurred 0x80040154?

1: Manual Technique to resolve Outlook 2007 error code 0x80040154.

2: Professional Solution to mitigate the unknown 0x80040154 error.

Manual Approaches to Troubleshoot the Outlook 0x80040154 Error Code

In order to resolve the ‘An unknown error occurred error code 0x80040154 Outlook, users need to follow the guidelines sequentially.

Method 1: Add Unregistered DLL Files

As we have already mentioned above, the root cause for throwing this error code is due to unregistered .dll files. Follow the steps to re-register the intercomm.dll in Windows:

1. Initially, click on the Windows Start icon and open Run dialog box.
2. Type “ regsvr32 inetcomm.dll” and press Enter key.
3. Restart the system and launch Outlook.

Now, check whether the issue is resolved or not. If you are not getting the error, then this means that issue is with unregistered registry files. However, if you are still getting the error use the below tricks.

Method 2: Disable the Add-ins or Anti-virus Software

In order to check the Antivirus is working properly or not the user needs to start the computer in Safe mode and launch the Microsoft Outlook program.

1. Press ctrl+R to open the run window.
2. Type “outlook.exe / safe” and press enter.

If the error still appears, then the problem is likely related to an add-in or an external program such as an anti-virus software installed on your computer.

Therefore, it is required to uninstall the suspected program that contains harmful viruses.

Method 3: Repair or Reinstall MS Office

Another method that you may try is to repair or re-establish the MS Office. Following are the steps that are required to do so:

Note: Make sure to have a back-up file of data before starting the process.

1. Right-click on the Start menu.
2. Select the Apps and Features option available from the list.
3. Now, choose the MS Office product you want to repair and click on Modify. The Office suite repair will initiate, and once the process finishes, check if the problem is resolved.

Method 4: Create a New Outlook Profile

Sometimes by creating a new Outlook profile prevent it from getting any Outlook error. To make a new MS Outlook 2010 account, move all of your old profile data into the new Outlook profile.

Even if you are receiving the Outlook unknown error code 0x80040154, then it means that your Outlook PST file is completely broken and damaged. In that case, you need to repair the corrupt file using the third-party software.

Methods 5: Fix “Outlook an unexpected error has occurred 0x80040154” due to Corruption

If you face this error due to corruption therefore, in the section, we come up with a reliable and efficient solution.

Outlook PST recovery utility is an advanced tool that can easily fix “an error occurred during activation 0x80040154’ caused due to corrupt PST file. The tool can easily recover corrupted / damaged / unreadable / inaccessible data files in a few clicks.

In addition, the software can recover any accidentally deleted data items into PST, HTML, EML, MSG, and Office 365. Also, maintain the original hierarchy of emails and keeps the meta-data properties intact.

A Final Note

This blog covers the most frequent error – “Outlook an unexpected error has occurred 0x80040154” code in Windows 10, 8, 7 OS. This unknown error may occur for a number of reasons.

Therefore, in this post, we have mentioned some manual solutions that can fix this error code 0x80040154 Outlook 2016, 2013, 2010, 2007, 2003.

Sometimes these tricks do not resolve the issue, in that case, we suggested to use a professional solution. That will help you to overcome this error.

You should read these troubleshooting guidelines if an unexpected error message appears on your computer in Outlook.

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Is the “Outlook, an unexpected error occurred” error message unexpectedly appearing on the screen? If it appears, it usually conflicts, gets corrupted, or becomes unresponsive to Outlook. You are the same in such a situation? If so, here’s a guide on the possible causes of this problem while learning about various repair and maintenance methods.

Reasons For An Unexpected Error In Outlook

Run a virus scan.Repair Outlook using third party utilities.Disable your antivirus software temporarily.Uninstall Microsoft Outlook add-ins.Set up a new Outlook account profile.Recover corrupted PST files with this mailbox recovery tool.

If Outlook does indeed encounter an unexpected error, it could be for any reason. Some of the possibilities:

• Your corrupted Outlook profile.
• An attached add-in may interfere with any of our Outlook features.
• PST file has been deleted or damaged.
• Old Outlook version
• Incorrect configuration or possibly installation of the application.
• Damaged attack
• Conflicting software
• Virus in the internal registry

Sometimes the reason can be anything. But as I said, when an error occurs, you will not be able to access your Outlook system. Since your saved emails and data are no longer available, you can look for solutions to resolve this specific issue.

We have discussed several ways to solve this problem on the nearest site. Read n detailed instructions on how to quickly access youryour favorite Outlook.

Five Methods | Fixed Learning Issue “An Unexpected Outlook Error Occurred”

After various causes of unexpected Outlook errors, here is an overview of alternative methods and their detailed steps.

1 Repair Office Application

If the error is also related to data file corruption, this time you need to repair your company’s Office application from Microsoft. Start the process with the following simple and painstaking steps:

If a Microsoft Office application is open or running, closing the problem is required to begin troubleshooting.

Step 3. Find Microsoft Office and right-click it.

Another step: click on the in-store repair option to start the repair process

After the repair is complete, start Microsoft Outlook and see if you need it now.

2 Set Up A New Outlook Profile

Creating the latest Outlook profile can also help resolve the issue. Create it by following these steps:

Step 3. Open “Profile View” and click “Add” tocreate a new profile.

Second step: give a name to the created profile and click “OK”.

3 Reinstall Outlook On Your Computer

If the Outlook installation is incomplete or incorrect, the game may also respond to an error. You can fix this by reinstalling Outlook by following these simple steps:

Step 2. Click Outlook and then select the Delete option. You will most likely see the Delete option when you right-click in Outlook. After uninstalling Outlook, click Remove completely.

Step 3. After successful uninstallation, restart your computer to reinstall Outlook.

Can you access Outlook now? If so, it means that every error was caused by an incorrect installation.

4 Use Outlook Mailbox Recovery Tool

Microsoft ScanPST.exe Repair Tool is a great way to fix a dangerous error. Follow these steps:

Step 1. Run the ScanPST.exe file as soon as you look at the Outlook installation file.

Step 2. Click Scanner. You will most likely see the option ‘Choose our own file for recovery ”. After using the file, click “Recover” to start the recovery process.

5 Try A Professional Outlook Recovery Tool

Will the error be resolved after completing all of the above steps? Use Stellar Outlook Repair; The idea will definitely help solve this problem. PST files are larger and get corrupted frequently. Regardless of the degree of corruption; Usually in many cases, powerful Stellar PST recovery software can help you fix the problem quickly.

In the main interface, you will see two options: Browse and Search. Click one of the other two options. You can click Browse if you already know the exact location of the archive, otherwise click Find to find the file you want.

After the alternate file, click “Recover” and start recovery. You can use the progress bar to see the growth process. If you want to stop the method at any time during the repair, press the Stop button. This stops the progression immediately. Total duration The process depends on the level of damage and the size of the file.

Software applications allow you to view and confirm recovered files before saving the entire group. Double click the files listed in the left sidebar. To find the view after clicking OK. Choose a location to save the file frequently.

Your file has been restored, you can now access Outlook.

End Result

Now, you should understand what are the various reasons why you are facing an unexpected error in Microsoft Outlook. Whenever you open Outlook and encounter such an error, try to remove it using the detailed methods outlined above, Stellar Outlook Repair is the best of them all and we recommend that you use it to fix them. Unexpected Outlook errors in the near future and with ease.

Download this software and fix your PC in minutes.

Usually, the last corrupted PST file is considered the root cause of most of the most common Outlook error messages. Although Microsoft provides an Inbox repair tool, if you need to repair a PST file, it may not work, or if it is badly damaged, it may not work.

Solution 1. If the problem occurs after updating.Solution 2: Use most of the Chkdsk utility.Solution 3. Fix it. NET Framework.Solution 4 – make sure some of them deal with basic services

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Outlook Er Is Een Onverwachte Fout Opgetreden
Outlook Ocorreu Um Erro Inesperado
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Outlook 예기치 않은 오류가 발생했습니다
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Outlook Ocurrio Un Error Inesperado

An error occurred in an error message that happens for some Outlook users when sending, receiving, opening, or deleting emails.

That error message more specifically states An unknown error has occurred.

The error can include 0x80040119, 0x80040600, 0x80070057, 0x800CCC67 and other codes, and it is usually due to corrupted PST files.

Here are a few tips that might fix the unknown error has occurred issue or an unexpected error has occurred annoying message from Outlook.

How can I fix An unknown error has occurred on Outlook?

1. Run an Anti-Virus Scan
2. Fix Outlook With Third-Party Utility Software
3. Temporarily Switch Anti-Virus Software off
4. Remove Microsoft Outlook Add-ins
5. Set up a new Outlook Account Profile
6. Fix Corrupted PST Files With the Inbox Repair Tool
7. Use the Outlook 2010 Hotfix Package
8. Try a new email client

1. Run an Anti-Virus Scan

A virus might have corrupted the Outlook data files. That’s more likely if your third-party anti-virus software needs updating.

First, check that your anti-virus software is updated; and then run a scan with the utility.

You can usually select a check for updates option within most anti-virus utilities to update the software.

For example, Avast has an Update option on its system tray context menu.

If you don’t already have a third-party utility installed, check out this software guide. Most of the more effective anti-virus utilities also have freeware versions.

Alternatively, you can utilize the Windows Defender app in Windows.

2. Fix Outlook with third-party utility software

There are numerous third-party utility applications with which you can repair Outlook’s PST files. The one that comes highly recommended is Stellar Repair for Outlook.

Fixing your PST file is easy. Once you download and install the software, you select the PST file from your computer. Then start the process by clicking the Repair button.

The software then provides a preview of the repaired PST file items. You can press a Save Repaired Files button on the Home tab to save the scan the details.

The software can recover not only emails, but calendars, contacts, notes, and attachments.

Hence, all that remains to be done is to try the tool for yourself and recover your Outlook benefits right away using the handy solution Stellar File Recovery Tool

3. Temporarily switch anti-virus software off

Switching anti-virus software off might be a good fix for unknown errors with the 0x800CCC67 code. In which case, an anti-virus utility might be blocking the SMTP protocol.

Most anti-virus utilities include a disable option of some kind on their system tray context menu.

As such, right-click the anti-virus software’s system tray icon and select the disable option to switch the utility off.

Then try sending an email from Outlook again to see if that fixed the issue.

4. Remove Microsoft Outlook add-ins

Add-ins can generate numerous Outlook errors. As such, removing the add-ins off might also fix unknown Outlook errors. This is how you can remove add-ins from Outlook.

1. First, right-click your Outlook shortcut and select Run as administrator to open the application.
2. Click File > Options to open the Outlook Options window.
3. Click Add-ins to open the options shown directly below.
4. Select COM Add-in from the Manage drop-down, and press the Go button. A new window will then open that includes a list of your add-ins.
5. Now you can completely remove an add-in by selecting its checkbox and pressing Remove. Alternatively, deselect the checkboxes to switch the add-ins off.
6. Press the OK button to close the window.

5. Set up a new Outlook Account Profile

Your Outlook profile might be corrupted. In which case, setting up a fresh new account profile in Outlook could feasibly fix the unknown error.

This is how you can set up a new Outlook profile.

1. First, press the Cortana button on Windows 10’s taskbar.
2. Enter ‘Control Panel’ in the search box, and select to open the Control Panel.
3. Click Mail 32-bit to open a Mail window.
4. Press the Show Profiles button, and then click the Add option on the Mail dialog box to set up a new account.
5. After setting up the new account, select the Always use this profile radio button on the Mail window.
6. Select your new profile from the drop-down menu, and click the OK button.

6. Fix Corrupted PST Files With the Inbox Repair Tool

Fixing corrupted PST data files is one of the best general fixes for unknown errors in Outlook.

Thus, Outlook includes an Inbox Repair Tool, otherwise, Scanpst.exe, to repair PST files. This is how you can scan a PST with that utility.

1. If you’re not sure where the PST file is on your hard drive, check its path from the Mail setup window. Open the Control Panel and click Mail 32-bit to open the Mail setup settings.
2. Next, press the Show Profiles button.
3. Select the Outlook profile you need to fix.
4. Click the Data Files tab, which includes the Outlook data file path. Take note of the default PST file path included on that tab.
5. Close the Mail window, and open the Outlook Inbox Repair Tool by entering ‘Scanpst.exe’ in Cortana’s or File Explorer’s search boxes.
6. Press the Browse button to select the PST file.
7. Click the Start button to initiate the PST scan.

7. The Outlook 2010 Hotfix Package

This fix is more specifically for unknown errors with a 0x80070057 code, which usually occurs when you try to set up new profiles with the Auto Account Setup process in MS Outlook 2010.

Microsoft has a hotfix package for the 0x80070057 error. However, don’t expect that hotfix to fix any other unknown error.

You can save that hotfix package to Windows by pressing the Hotfix Download Available button on this website page.

Then enter an email address so that you can receive an email that includes a download link and password for the hotfix.

Run the hotfix exe, enter the required password, and restart Windows after the hotfix weaves its magic.

Those are some of the best resolutions for Outlook’s unknown error has occurred error messages.

If further fixes are still required, check out the Support and Recovery Assistant for Office 365 that can also resolve numerous MS Outlook issues.