Milks your battery after 10-15 minutes on the iPhone Pro Max 13 & custom coded GrapheneOS.. The preset meeting rooms when clicked/held for deletion it should stay that way. MS assumes you want these kind of meetings and reverse engineering this app, clearly shows MS logs every keystroke. App is buggy at best. HEAVILY CODED for the wrong reasons. Most of the five star reviews are a*s kissing employees (devs) hyping up their work on the app. You're not special! Do better with this bad source code.