Learn How to Troubleshoot Msimn.Exe Error in Outlook Express Easy Steps

admin ~ Published: 30-05-2018 ~ Microsoft Outlook , Outlook Express ~ 5 Minutes Reading

Sometimes while using Outlook Express program, users may encounter some critical error messages that crashes or freezes the active window. In this problem tackling blog, we are going to discuss one such error i.e., Outlook Express Msimn.exe error. So, let us begin with a brief introduction for the Msimn.Exe Error in Outlook Express

What is the msimn.exe error in Outlook Express?

Msimn.exe is the executable for Outlook Express. If there are incorrectly configured system settings or the irregular entries in the Windows registry then, Outlook Express displays error in msimn.exe. This msimn.exe error in outlook express message can occur in various forms like:

fix msimn.exe error in outlook express

These error messages may result in the following circumstances:

  1. Mark .dbx files as Read Only
  2. Damaged user Identities key in the registry

How to Fix Msimn.exe Error in Outlook Express?

Now, to fix this issue, make sure that DBX files are not marked as Read Only. If the error still remains same then, regenerate the identities registry key. Follow below-mentioned guidelines to fix this issue:

Note: Before executing the below-mentioned steps, it is recommended to take the backup of your emails and addresses.

Verify that your.DBX files are not Read Only

The DBX data files are the store files of Outlook Express folders. If these files are marked as Read Only then, they will become inaccessible. To disable the Read Only option:

  1. Hit a click on Start » Find/Search » Files and Folders
  2. Now, in the Name field, enter *.dbx and set the search to add local hard drives
  3. Hit a click on Find Now or Search Now and after displaying the results click on In Folder column heading to group items via location.
    Note the path of files and use Windows Explorer to navigate to the directory which comprises your current store
  4. Hit a right-click on the first file in the folder then, click on Properties » General
  5. Next, uncheck the Read Only check box and hit OK button to fix Outlook Express Msimn.exe error
  6. Repeat last two steps for each file in the folder then, test Outlook Express


Note: By default, the data files are saved in the Identities folder under a location one of the following:

In this section, we will introduce you to a manual solution to fix the Outlook Express error 0x800CCC1A. All you have to do is, follow the guidelines sequentially to avoid any kind of data loss:

    1. Drive » Documents and Settings » username » Local Settings » Application Data » Identities » {114378F3-CC8A-4992-B5B4-CCEA0A42A2B6} » Microsoft » Outlook Express
    2. Drive » Windows » Application Data » Identities » {114378F3-CC8A-4992-B5B4-CCEA0A42A2B6} » Microsoft » Outlook Express where Drive is the letter of the drive.

Important Note: Here, GUID number {114378F3-CC8A-4992-B5B4-CCEA0A42A2B6}, is just an example. The searches can vary according to user’s requirements.

Regenerate the Identities Registry Key

In this section, we will discuss how to modify the registry. A single wrong step taken by users may lead them to permanent data loss. Thus, users are recommended to follow the guidelines sequentially. For protection, it is better to backup the registry before executing the below steps. To regenerate the identities keys:

  1. Click on Start » Run then, type regedit and hit the OK button
  2. Browse the registry to following registry key:
  3. HKEY_CURRENT_USER/Identities
  4. Now, in the Registry menu, hit a click on Export Registry File
  5. Then Save In the box, click on Desktop to resolve Outlook Express Msimn.exe error
  6. Comes In File Name section, type Identities, and hit the Save button
  7. In Registry Editor, hit a right-click on Identities key then, hit the Delete button
  8. Eventually, quit the Registry Editor and start the Outlook Express to test its functionality
  9. Now, you are capable to restore mail, address and the account settings

In Case of Multiple Identities Then How to Fix MSIMN.EXE Error in Outlook Express

If there are various Identities on your local machine then, follow the below-mentioned guidelines to search the GUID number (i.e., as shown above, {114378F3-CC8A-4992-B5B4-CCEA0A42A2B6})

  1. Hit a click on Start » Run to begin the procedure to resolve Outlook Express Msimn.exe Error
  2. Type Regedit and hit the OK button
  3. Navigate to the following registry key:
  4. Hit a click on the “+” (add icon) that is situated next to the Identities
  5. To recognize which GUID related to which Identity, click on the GUID from the left side wizard
  6. Now, in the right side pane, search for the data name “User Name” and this is the name of Outlook Express Identity

Concluding Lines

Outlook Express is an email client that allows users to save, send, receive and negotiate email messages. However, while using this email application the users face several difficulties and error messages like Outlook Express Msimn.exe Error. These all things affect their business and productivity. Also, this application is outdated now. Hence, it is better to choose an efficient email platform i.e., Microsoft Outlook. It is so because it provides several advanced features and a user-friendly GUI. For enhanced functionalities, users should migrate from Outlook Express to Outlook.