Home : File Types : MSO File (2 File Associations)

.MSO File Extension

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File Type 1Microsoft Office Macro Reference File

DeveloperN/A
Popularity
3.3 (55 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryMisc Files
FormatN/A

Unknown

File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.

Definition

File created when saving a Microsoft Office document as a Web page; contains information about macros and OLE (Object Linking and Embedding) objects included in the original file; may be referenced by the created Web page as a style sheet.

More Information

May be viewed with a text editor, but will be unreadable since the contents are encoded.

Programs that open MSO files
Windows
Should not be opened manually
Mac
Should not be opened manually
Updated 12/20/2006

File Type 2Inline E-mail Attachment

DeveloperMicrosoft
Popularity
2.4 (12 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryMisc Files
FormatN/A

Unknown

File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.

Definition

File sent with Microsoft Word 2000 e-mail attachments; often named "Oledata.mso;" contains information that allows the attachment to be rendered within the e-mail message.

More Information

The Oledata.mso file will appear as a separate attachment on computers that do not have Microsoft Outlook 2000 or later installed.

Programs that open MSO files
Windows
Microsoft Outlook 2016
Mac
Microsoft Outlook 2016
Updated 1/4/2008