Tips to open INDX file

Can't open the INDX file? You are not the only one. Thousands of users face similar problems every day. Below you will find tips on how to open INDX files as well as a list of programs that support INDX files.

INDX file extension

File Name Microsoft Mail Index
File Developer Microsoft Corporation
File Category Database Files

The INDX file is supported on 1 operating systems. Depending on your operating system, you may need different software to handle the INDX files. Below is a summary of the number of programs that support and open the INDX file on each system platform.

Operating systems
  • 1
  • 0
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  • 0
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What is INDX file?

The file with the extension INDX is the Database Files file type. The creator of this file is Microsoft Corporation. Additionally, the Database Files category contains 403 of other files. Microsoft Mail Index appears on 1 operating systems as a functional file. The file will work on Windows systems, unfortunately not on others. The main program that supports this format is Microsoft Mail. This was created by Microsoft Corporation.

How to open INDX file?

The most common problem when using Microsoft Mail Index is that a specific INDX is not associated with the program. This causes the file INDX to open by system applications not designed for this purpose, or to display a message that there is no associated program. This can be quickly resolved by following the instructions below.

The first thing you should do is just "doubleclick" on the INDX file icon you want to open. If the operating system has an appropriate application to support it and there is also an association between the file and the program, the file should be opened.

Step 1. Install Microsoft Mail

An often overlooked issue is to make sure that Microsoft Mail is installed on the computer. The easiest method is to use the system search engine by entering the program name Microsoft Mail in it. If it is not, installation may solve the problem, as most applications create file associations during installation. Below you will find a list of applications that support INDX files.

Programs to open INDX file

Remember to download programs supporting INDX files only from verified and safe sources. We suggest using the websites of software developers.

Step 2. Create association of Microsoft Mail with INDX files

However, it may happen that the application itself does not cause the INDX file to open in the Microsoft Mail application, but you can set it manually. The association can be created using the drop-down list available by right-clicking on the file and selecting Properties. The window will show, among other things, the type of the file and the information by which the program is used to launch the file. Changes can be made using the "Change" button. If there is no software on the list, simply select "Browse" and manually select the directory where the application is installed. The "always use the selected program ..." field will set the Microsoft Mail application as the default for handling the INDX file.

Step 3. Update Microsoft Mail to the latest version

The fault may also lie with the Microsoft Mail program, it is possible that Microsoft Mail Index requires a newer version of the program. In this case, use the Microsoft Corporation website or update the program from the application.

Step 4. Check for the following problems with the INDX file

The problem may also be with the file itself if the above steps don't work. The most common file problems are:

Very often, the file may be size 0 or incomplete. Usually this applies to INDX files downloaded from the Internet in case the download did not finish properly. The file should be downloaded again, making sure that the process has finished correctly.
The computer may have fallen victim to a computer virus or hacker. Perform a virus scan using available and up-to-date anti-virus software. Alternatively, you can use the scanners available online. However, it is important to scan the entire system, not only the file INDX or the program directory. However, remember that not every infected INDX file can be recovered, so it is important to take care of regular backups.
A typical compatibility error - the program does not support the older version of the INDX file. On their websites, developers usually offer free solutions to such problems, e.g. in the form of a conversion program or an older version of the program.
The file may be corrupted in a number of ways. The repair method must be adapted to the type of file and damage. Sometimes the program itself has options to repair the most popular INDX file corruption. The easiest way to restore the file is from a backup or by contacting Microsoft Corporation, but this one can be expensive. Not all damage can be reversed.
The program indicates that the file is encrypted or corrupted. The encrypted INDX files cannot be played on other computers than the one on which they were encrypted, they must be decrypted before using on another device.
The operating system protects files in some locations (e.g. the root of the system partition) against unauthorized access. While there is usually no problem reading such a file, it may not be possible to save it. Copying the INDX file to another location will fix the problem.
This problem only occurs with more complex files. Some file types can only be opened in one program at a time. Closing other programs should help. If the error persists after closing other programs, wait for a while. Some anti-virus or backup software may occupy the INDX file for a certain period of time. If nothing helps, please reset the device.