The next few weeks are going to be a little weird for people using Microsoft Office on an Apple device. Because of how certificates for Office on iOS and macOS work, the productivity apps will soon “lock themselves down” and prevent users from editing documents. The good news is that Office 2021 and Microsoft 365 users will get an update that fixes it. The bad news is, if you’re still using Office 2019, your app is going to lock you out of editing soon, and Microsoft isn’t going to help.