@Mi Lo - Usually a team mbwr with the role of Team or Company Admin can delete the member from the team and with reassign the deleted user's boards/projects/custom templates or just delete the content.
What plan type do you have? Free, Team, Business, Consultant, or Enterprise?
@Robert Johnson, I appreciate your quick reply! Thanks!
We have a consulting plan. Our Admin just tried. He told me that nothing has changed. Does is take a while until the board can be managed?
Best,
Michael
@Mi Lo - I believe there are two steps: Delete them from the team, and from the company.
Have a look at the Remove users help center article → https://help.miro.com/hc/en-us/articles/360017571234-Remove-users#h_01F7872NTW1YXPCPMWWK8SZVT6