.mso File Extension
Various file types are recorded to be associated with the .mso file extension. A detailed description of these file types is shared below.
File Type #1 – Inline E-mail Attachment
The .mso file extension is recorded to be associated with an inline e-mail attachment sent using Microsoft Word 2000. An additional file named Oledata.mso is created when an HTML email is composed that stores an inline Microsoft 2000 document. This file stores the necessary information that is required to render the original application.
When the recipient opens the email using Outlook 2000 or a later version, the additional .mso attachment is not seen. Whereas, if the recipient of the email uses an earlier version of Outlook (versions before Outlook 2000) or some other email client then an additional attachment, Oledata.mso file, is seen.
Can an .mso (Inline E-mail Attachment) file be opened manually?
Although, you can open .mso files using any text viewer, these files are encoded which means the .mso files cannot be understood by a user and do not contain any information that is of use for the user. However, you must not delete the .mso file as this may make the attached Word document unusable.
File Type #2 – Microsoft Organization Chart file
The .mso file extension is also used by Microsoft Organization Chart, which is used for creating and editing organization charts in Office 2003 applications.
File Type #3 – Microsoft Office Macro Reference File
The file extension .mso is also used with Microsoft Office Macro Reference file. .mso files are created when you save documents created in Microsoft Office as web pages to store information about macros and OLE (Object Linking and Embedding) objects.
How to view .mso (Microsoft Office Macro Reference) Files
Although you can open Microsoft Office Macro Reference .mso files using a text editor, the contents of the file are unreadable as they are encoded.
File Type #4 – FrontPage File
The .mso file extension is also associated with Microsoft FrontPage. Little is known about this file type, its behavior, or purpose.
How to open file types that report a file type error
If you receive a file type error while opening a particular file, try a file extension repair tool. A file extension repair tool can repair any problems with corrupt files to make them usable. Also, if you don’t have a supported software on the system, this tool can help you open, edit, and save files with different file extensions.