MSO File Extension

Inline E-mail Attachment

File Type mso
Developer Microsoft
Popularity
4.8 (42 votes)
Application Microsoft Organization Chart
Category Data Files, Document Files

What is a MSO file?

Inline E-mail Attachment files, recognized by the MSO extension, fall into the Data Files and Document Files categories, amounting to 7165 files.

The Inline E-mail Attachment (MSO) was created by Microsoft, a company that developed file format and produced 242 programs for their use.

MSO files are supported by Windows. If you need to open a MSO file, you can use one of 5 programs, such as Microsoft Organization Chart, Microsoft PowerPoint and Microsoft Word.

Programs that support MSO files

Windows ⁵

Windows

How to open a MSO file?

If you’re having difficulty opening a MSO file, it is often due to not having the correct software. To solve the problem, choose a compatible program from the list. Then follow the link to the official developer site, download the software, and install it on your device.

Microsoft Organization Chart, Microsoft PowerPoint and Microsoft Word stand out as the preferred programs to manage MSO files effectively. To install the latest version of Microsoft Organization Chart on your computer, visit the Microsoft website where you can download the version available for all operating systems.

After installation, your operating system should automatically open MSO files with Microsoft Organization Chart.

Set Microsoft Organization Chart as the default MSO handler

Choose an app to open a file on Mac

Right click or use Control + left click on the desired MSO file to launch the file options menu;
Choose "Open in Application" and click "Other";
Next, at the bottom of the window, you will see the "Enable" menu, in which "Recommended Programs" is selected by default;
In this menu, select "All Programs", then find Microsoft Organization Chart and check the box next to "Always open in the application."

Set default programs for Windows

Start by right-clicking on your MSO file, then select "Open With" and continue by clicking "Choose another app" from the options provided;
In the pop-up window, find and select the Microsoft Organization Chart application from the available options;
Make sure the "Always use this app" checkbox is checked and click "OK" to confirm your choice as the default app for opening MSO files.

Convert files to and from MSO

If you have trouble working with a MSO file, try converting it to JPG, PDF, XLS, DOC, DOCX or similar data files.

Be aware that converting a MSO file may reduce some features, but you can usually revert it to the original format.

Convert MSO to other file formats

Effective solutions for MSO file problems

There are some common issues with MSO files that can be resolved easily by making minor adjustments to your software. Below, you’ll find these issues along with practical troubleshooting tips.

What are the methods to detect if my MSO file has been corrupted?

MSO data files that have become corrupted may display one or more of the following symptoms:

An unexplained increase in the size of the MSO file;
Trying to work with the archive in Microsoft Organization Chart or other programs causes instability or program crashes;
The file does not open correctly or displays error messages;
While working with the file, error alerts are encountered;
The file exhibits poor performance during editing operations in Microsoft Organization Chart;

Why does Microsoft Organization Chart crash?

Insufficient software updates can contribute to Microsoft Organization Chart crash. To avoid this, make sure that you have installed the latest updates for Microsoft products.

Restarting your computer can resolve numerous common problems, so it should be the initial step before changing any software-related settings.

How to repair a corrupted MSO file?

Open the damaged MSO file in a recovery program and select the "Repair" menu item to start the repair operation. Please wait patiently for the recovery process to finish as it will automatically repair the damaged data files.

How to edit a MSO file?

To make changes to MSO files, you need specialized software that allows both opening and editing the data files. Online MSO editors offer fewer capabilities than applications optimized for Inline E-mail Attachment.

Best MSO editors 2026

Based on these criteria, we have prepared a list of available MSO editors.

MSO Editor Software	Developer	Platforms	Overall Rating
Microsoft Organization Chart	Microsoft	Windows	4.2 out of 5 (40 reviews)

‹ MSP | MSMESSAGESTORE ›