Hi @Joost24 ,
Please refer to the below steps:
1.Open their calendars in your Outlook(Because you are given permission).
For example:
2.Create a temp calendar(for example, named Christy01) for all staff member via right click the calendar>New calendar.
3.Import the csv file to the temp calendar.
4.Click the temp calendar, click View>Change View>click List. Then you just need to press Ctrl+A to select all the canlendar events and drag and drop them to staff menber's calendar that opens.
Hope the above!
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