Setup public calendars to show appointments of all users
Telephonists and other colleagues need to see if colleagues are available or in a meeting. To show 100+ shared user calendars in everybodies private calendar is unfeasible.
Give the option to show a copy of your appointment in a public calendar.
Now you can create a Office calendar, Absence/holiday calendar etc.
Arthur Visser commented
We recently decided to stop using a server, which, among other things, has the ability to show all users calendars on request (tick a checkbox near the user's name). Which is indeed vital for telephonists or colleagues to find out where somebody is at a certain time. So just viewing would be enough. I now found out this is not an acceptable option in Kerio Connect. We don't want to share/subscribe all users calendars to each other. People warn me this will be slow and error prone. I fear our company will now not only switch calendar server but will also look for another mailserver solution.