Hi @Dimitri2 ,
Please refer to the below. I am on my mobile so the designer will look different.
1. Setup the MS Forms trigger and action to get the response. Initialize an empty array e.g. MyArray

2. Add a switch statement based on the choice field from your MS Form. Add a branch for each option. In each option, add a Set Variable action

3. In each Set Variable, specify the people and group in the exact format. You will just need to replace the email of the people and group.


3. Pass the array in the people picker field of your Sharepoint Update Item action.

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