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 2.8 (17112700).
This is a preview of the December 2017 feature update for Word, Excel, and PowerPoint for iPad and iPhone which brings Confident protection. This feature requires Office 365 subscription. Check out the changelog below.
Using persistent protection, you can now prevent sensitive information from being viewed, printed, edited, or copied by unauthorized people. You can protect documents, spreadsheets, and presentations without leaving Word, Excel, or PowerPoint.