Sync Pro Solo and Pro Teams customers can open and edit Office documents stored in Sync, using the Microsoft Office 365 online web-based editor. Open and edit from the Sync web panel with Office 365
Sync includes Microsoft Office and Office 365 integrations that make it easy to open and edit Office documents stored in your Sync account using the Office for mobile, web or desktop apps, and save those edits back to Sync. Microsoft Office for Sync getting started guide
