We are experiencing lots of calendar issues where the meeting drops out the calendar. It happens to me every week. Several others have had the same issue. It's weird when I am the inviter, it will drop off my calendar but not the invitees. Or some of the invitees get the invite but the others do not have it on their calendar. It's becoming a huge frustration to the team. Today is a good example, I had a meeting set up for 9am and the invitees all came and I didn't realize it dropped off my calendar. I know it was there on Thursday because I reviewed and it showed Monday was full.