Fix Outlook Error Code 0x80040154 – Detailed Guide

While configuring Microsoft Outlook, an unknown error may result in ‘error 0X80040154’. If all other manual troubleshooting steps fail to work, here’s what you should do to fix Error 0x80040154 in Outlook. An unknown error occurred, error code 0x80040154. 0x80040154 is a code that can be seen when using Windows Update, Microsoft Store, Outlook, or the Mail & Calendar app. Here’s how to resolve the issue.

Most of the time, when Error 0x80040154 pops up in Outlook, it’s the result of a faulty add-in, damage to a PST file, or accidental deletion of an important system file. PST files are important because they store all kinds of information.

Why does my Outlook email keep saying error?

As we mentioned before, a corrupted PST file is often the root cause of error messages in Outlook. While Microsoft does offer an Inbox Repair tool to repair PST files, it may not be effective in cases of severe corruption.

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Fix Outlook Error Code 0x80040154

To remove this Error 0x80040154 in Outlook, use any one of the following methods.

  • Open Outlook in Safe Mode and see.
  • Disable any newly installed add-in.
  • Check if Outlook is running in Compatibility mode.
  • Re-register the inetcomm.dll file.
  • Repair Office.

Open Outlook in Safe Mode and see

When Outlook is giving you an error, exit the program. Click it again while holding down the Ctrl key. When it asks if you want to open Outlook in safe mode, hit Yes and run the program. Now, try receiving new emails to see if the problem is fixed. If Outlook can run in Safe Mode, then surely some addon or extension is creating issues.

Disable any newly installed add-in

In Outlook, a COM add-in and Outlook add-in usually carry out different actions which Outlook does not provide. Despite the fact that add-ins are standalone programs, sometimes an Outlook COM add-in might have issues that can slow down Outlook or produce an error 0x80040154.

If you have just installed an add-in for Outlook and are now experiencing problems, disable the add-in to see if this solves the problem. To do this, open Outlook and go to File > Options > Add-ins. Remove any recently added add-ins.

Check if Outlook can run in Compatibility mode.

  • Go to the following location – C:\Program Files\Microsoft Office\Office <N>\outlook.exe.
  • Here <N> is the Office version number.
  • Here, right-click the file and choose PropertiesCompatibility.
  • Now, uncheck “Run this program in compatibility with…” and check if Outlook is working.

Re-register the inetcomm.dll file.

If the inetcomm.dll file isn’t registered, it might stop Outlook from functioning properly and cause error code 0x80040154. Try registering the inetcomm.dll file in Windows to fix this.

  • Open the Run dialog box by pressing Windows + R.
  • Next, type the following command and hit the Enter

regsvr32 inetcomm.dll

  • This command will re-register the inetcomm.dll file.

Repair Office

  • If all methods fail to work, consider repairing the Office.
  • Open the Run dialog box by pressing Windows + R.
  • Next, type the command and hit the Enter key.
  • This command will open the Programs and Features.
  • Right Click on Microsoft Office 365 and choose Change.
  • In the next window that appears, choose Online Repair and click on Repair.
  • One of these is sure to help you fix the Outlook error.

How do I see errors in Outlook?

To access the Outlook error log:

  • Open Event Viewer
  • Expand the Applications and Service Logs.
  • Check the Microsoft Office Alert section
  • You can see errors in Outlook here.

That’s all there is to it!

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