Hi Cornelius,
My first thought would be to create a regular group, add all relevant users to that group and write a PowerShell Script which loops through all those users in that group and reset their passwords. ;-)
Something like this:
https://morgantechspace.com/2022/09/bulk-password-reset-of-microsoft-365-users-using-powershell.html
I hope my answer is helpful to you,
Your
Bjoern Peters
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