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.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

Macintosh

IconMicrosoft Outlook for Mac

Updated 2007
File Type 2 Generic IconMicrosoft Office Macro Reference File
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

Macintosh

IconShould not be opened manually

Updated 2007
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