Microsoft has rolled out a fresh new update for users in the Preview Build of Office Insider Program of iOS. The latest build version is Version 2.21 (190101) for Word, Excel, and PowerPoint.
This is a preview of the January 2019 feature update for Word, Excel, and PowerPoint for iPad and iPhone which brings new changes to Word, Excel, and PowerPoint. This feature requires Office 365 subscription.
Get their attention with @mentions
Use @mentions in comments to let co-workers know when you need their input.
Collaborate effectively with comments and @mentions
Keep the conversation going right in your worksheet with the built-in reply box and let co-workers know that you need their input by using @mentions.