The January feature update for Word, Excel, and PowerPoint Mobile is now available.

Release details
Here's everything you need to know about the update.

Audience: Word, Excel, and PowerPoint Mobile
Released: January 25, 2018
Package versions: 17.9001.2102 for Word, Excel, and PowerPoint
Platform: Windows 10 devices
Description: January feature update
Features: What's New in Office 365 for Windows Mobile


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Source: Announcing the January feature update for Word, Excel, and PowerPoint - Microsoft Community