How To Fix Outlook MAPI32.DLL Error? [SOLVED]

I have been using Microsoft Office for several years without any problem. I use Office 2016 on Windows 10. Since yesterday, Outlook is refusing to open and the dialog box says mapi32.DLL is corrupted/ Outlook MAPI32.DLL Error.

However, everything else is working fine, including Word.
What can I do?

[Frustrated and anxious MS Office user]

Table of Content:

1. What is Outlook MAPI32.DLL Error?
2. How to Fix Outlook MAPI32.DLL Error?

3. Features of Stellar Repair for Outlook


I have been using Microsoft Office for several years without any problem. I use Office 2016 on Windows 10. Since yesterday, Outlook is refusing to open and the dialog box says mapi32.DLL is corrupted. It’s very common for us to get such frantic messages about Outlook MAPI32.DLL Error in our chat box. When a dialog box pops up and shows – “Outlook failed to start because mapi32.dll was not found. Re-installing the application may fix this problem”

The immediate reaction is one of panic because Outlook is so important since it is a scheduling manager besides an email client.

Fix Outlook MAPI32.DLL Error

But solutions are there.

Indeed mapi32.DLL (also known as MAPI32.DLL) errors are quite common with Outlook.

Let’s delve deeper and help you solve the problem.

What is Outlook MAPI32.DLL Error?

It is a DLL file which is short for a Dynamic Link Library. Missing the crucial file causes DLL error in Outlook.

A library file (only found on Microsoft) is a file that contains code that can be used by more than one program (hence the “library”).

Also Read: What are Outlook PST files?

Mapi32.DLL stops working because of four reasons:

  • Faulty upgrade— Outlook upgrade frequently causes this problem. Usually, it happens a day or two after updating Office or a new patch.
  • Cannot recognize— The mapi32.DLL file is in place, but for some reason, Outlook no longer recognizes it.
  • Malware— A virus has altered the mapi32.DLL file in some way, and it no longer works with Outlook.
  • Deleted— The file has been deleted (probably due to running a registry cleaner app).

How to Fix Outlook MAPI32.DLL Error?

1. Use System Restore

From the time of Windows XP, the OS takes a snapshot of itself and stores it. Of course, the System Restore has to be operational. By default, it is turned off in a new PC or after format.

Type in Search Bar, “System Restore” and Open

Fix Outlook MAPI32.DLL Error

Click System Restore and Next

Click System Restore

Choose from Restore Points

Choose from Restore Points.

Fix Outlook MAPI32.DLL Error

Click Next. 

The OS will now restore itself to what it was a day or two ago.

Note that System Restore only affects programs and not personal files. If you created fifteen Word documents and three PowerPoint presentations in the past four days, it would do nothing to them.

Once restore completes try to open Outlook.

Also Read: How to fix Outlook Error “Not Implemented”

2. Use SFC Scan

SFC stands for System File Checker

It is a Windows tool that checks if all the system files are present and replace missing ones. You need the original install media (DVD or USB) from which you installed Windows.

Type CMD in the Search bar.

Right-click and select “Run as administrator”

Outlook MAPI32.DLL Error

Type sfc /scannow and hit Enter

Outlook MAPI32.DLL Error

The PC will now check for errors. It might restart on its own and ask for install media. The process is the same for Windows 7, 8, 8.1, 10, and 11.

In the end, try to start Outlook.

3. Recreate mapi32.DLL

Open C drive

Navigate to Program Files > Common Files > System

Select the MSMAPI folder and open it

Open folder 1033

Rename the existing MSMAPI32.dll to MSMAPI32.old

Now restart the PC and start Outlook.

If it doesn’t work then type fixmapi.exe in Search Bar

Outlook MAPI32.DLL Error

Run the program

Restart the PC and start Outlook. 

4. Run Antivirus Scan

The reason behind Outlook MAPI32.DLL Error might be malware. Outlook has always been a favourite target for hackers. It has contacts, phone numbers, and calendar–rich pickings for them.

Most antivirus can be set to Quick and Deep scan.

Manually update the antivirus and set it to Deep Scan.

Outlook MAPI32.DLL Error

Let it run overnight.

5. Reinstall Office Suite

Type Control Panel in the Search bar.

Open Control Panel and navigate to Programs

Reinstall Office Suite

Select Uninstall a Program

Outlook MAPI32.DLL Error

Uninstall all the Microsoft Office programs you have (the personal files are safe).

Restart the PC and reinstall Office Suite.

Also Read: Easy & Quick Ways to Fix Outlook PST Error 0X80040116

6. Use Stellar Repair for Outlook

Outlook MAPI32.DLL Error can often persist and none of the methods stated above work perfectly.

You have no choice but to stop fiddling about with different methods and use Stellar Repair for Outlook.

Outlook works by using PST files. These are archival files that make it easy to copy and backup data related to emails, contact, calendar, and more.

Most problems with Outlook can in some way be traced back to corrupted and non-working PST files.

Stellar Repair for Outlook is the best PST repair tool on the market.

Also Read: How to get Activation Key for Stellar Outlook Repair?

Features of Stellar Repair for Outlook

  • Stellar Repair for Outlook repairs Outlook PST files in a matter of minutes. It does not delete or harm your data.
  • Can perfectly retrieve emails, contacts, calendars, and settings from any PST file including those which are password protected.
  • Can export the data in several different formats other than PST – HTML, MSG, RBOX, RTF, and more.
  • Splits and compacts large PST files and exports them to Microsoft 365.
  • Stellar Repair for Outlook is available for Windows 7, 8, 8.1, 10, and 11 

To find out if it works try out the free-of-cost evaluation version. Download Stellar Repair for Outlook without spending a cent and install it.

Also Read: Outlook PST File Not Found: 3 Solutions

The PST Repair Tool will scan the Outlook folder and offer a complete preview of the emails.

To save the items you need to buy a license key. The purchase happens through the software.

The process of using it is as easy as 1-2-3

Download and install the Stellar Repair for Outlook from this location

free windows download

Click on Browse and select the PST file you want to repair

Stellar Repair for Outlook

Click Repair and wait while the algorithm processes the data

Click Repair

The program will show a preview of the contents. select what you want to save.

Save the repaired file in the location you want.

Save the repaired file

It’s really easy to operate, and the user needs no experience in handling difficult software.

The UI is friendly and offers support every step of the way. In case you are confused, call us and we shall solve your problem immediately. Our customer care team works 24×6.

Last Words…

Do not worry that your personal data is destroyed if Outlook MAPI32.DLL Error shows constantly. As soon as you perform a PST repair with Stellar Repair for Outlook your PC would be back in action. Keep calm, and do not download the mapi32.DLL file from unknown sites. It is a surefire way of losing control of your device to hackers. 

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