Thanks to everyone who volunteered for testing the Office 365 group calendar. The TAP team will be reaching out as we are closer to being ready.
~AlexJohn McGowan commented
Surely this is a basic tool for collaboration? I tried a workaround with adding a link to the Team calendar created by default in OWA, but is shows your personal calendar instead.
This needs to be a blank calendar, to which you can add milestones, vacations, and so on.