Sharing an app window in IE can lose focus
When you share an application or specific window, screen share displays that area correctly. However, if you bring a different window in front of the app you are sharing, the focus switches and your guests see what you are viewing on your screen.
Workaround: Use Chrome or the GlobalMeet desktop app to host your meeting. If IE is your only option, then remember to switch back to the area you want to share with your guests.