PC.net

.mso

File Type 1 Generic IconInline E-mail Attachment
File Format Proprietary (Microsoft)
Usage Open manually
Rank ★ ★ ★  Common
Description

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.

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

Open With
Windows

IconMicrosoft Outlook

macOS

IconMicrosoft Outlook for Mac

Updated 2007
File Type 2 Generic IconMicrosoft Office Macro Reference File
File Format Proprietary (Microsoft)
Usage Referenced by an application; not meant to be opened manually
Rank ★ ★ ☆  Average
Description

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.

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

Open With
Windows

IconShould not be opened manually

macOS

IconShould not be opened manually

Updated December 20, 2006
Information from the PC File Extensions Reference
https://pc.net/extensions/file/mso
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