Microsoft Office Online now allows real-time co-authoring on documents stored on cloud services like Dropbox, Box, and Citrix ShareFile
New cloud storage options for Office mobile and Office Online — Today's post was written by Kirk Koenigsbauer, corporate vice president for the Office team.
Context & Ripple Effects
This is the payoff of a two-year opening move: Microsoft's February 2015 update first let Office mobile and web apps read and write files on third-party clouds, and Dropbox followed by letting users create and edit Office documents inside its own iOS app. What changed today is that the collaboration layer itself — real-time co-authoring — now works on files that never touch OneDrive, extending the same treatment to Box and Citrix ShareFile.
First-order effects
- Dropbox, Box, and Citrix ShareFile customers get live multi-user editing through Office Online without migrating documents to OneDrive, removing the biggest practical reason to consolidate storage onto Microsoft's own cloud.
Second-order effects
- Google Docs' core pitch — real-time collaboration independent of where files live — loses its differentiation against Office for these storage providers' users, pressuring Google to defend its workspace bundling while Dropbox and Box can market 'keep your files, gain Office collaboration.'
Third-order effects
- Microsoft is decoupling Office's value from OneDrive lock-in and re-anchoring it as the editing-and-collaboration layer across any cloud, a pattern the corpus shows continuing as co-authoring spreads to Excel desktops for Office 365 insiders and to iOS apps — positioning the document surface, not the storage silo, as the strategic asset.
The trend: Office productivity is consolidating around Microsoft's collaboration layer atop competitors' storage, as co-authoring rolls out from web apps on third-party clouds toward every Office surface.