Microsoft has released Office Insider Preview Build 14931.20010 for Windows users registered in the Office Insider Beta Channel. The update includes no new features, but it does offer a bunch of fixes for issues found in Word, Excel, PowerPoint, Outlook, Project, Office Suite. You can see the full official change-log below.
Changelog
To update to the latest Microsoft Office Insider Preview Build, open any Office program and go to File> Account> Update Options> Update Now.