Visually distinguish appointments with the status Free / At another location / With reservation / Booked / Out of office as in Outlook.

In Outlook, a bar is displayed on the left-hand side of appointments with a status which looks different depending on the status.
This is the case in the day view and also for all-day appointments throughout the day.

I miss this visual distinction and it would help me to see at a glance whether I am already booked or out of the office for the whole day, for example.