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Office 365

by Microsoft Corporation · opens 3 file types
Cross-platform
Download (office.microsoft.com)
Verified by Adam B.· reviewed by FE Editorial ·updated Aug 14, 2026
AT A GLANCE
DeveloperMicrosoft Corporation
PlatformsCross-platform
Opens3 file types
Get it fromoffice.microsoft.com
Download Office 365

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3 file types verified
Last reviewed Oct 2026

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What is Office 365?

Office 365 (now Microsoft 365) is Microsoft's subscription suite of productivity apps, including Word, Excel, PowerPoint and Outlook. It opens and edits the standard Office formats such as DOCX, XLSX and PPTX across desktop, web and mobile.

Files Office 365 opens

3 formats
Misc Files
.OLK15MESSAGE.EXE_0002
Data Files
.XSF

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Download Office 365

SOURCEoffice.microsoft.comofficial site - avoid third-party download portals
PLATFORMSCross-platform
Download from office.microsoft.com

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programs & formats

Files Office 365 opens most

1.XSFMicrosoft Office InfoPath file
2.OLK15MESSAGEMicrosoft Outlook for Mac message
3.EXE_0002Microsoft Outlook Inbox Repair Tool update

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