To remove a member’s administrator role, follow these steps:
In the top right corner locate your profile picture and your name. Click on either one.
A drop-down list will open with several options, look for the Teams icon and click on it.
Select the Members heading.
Locate the member you wish to make an administrator in the members list. In the options column, click on the 3 dots.
A drop-down list will open. Choose the Remove admin option.
Confirm in the new window that will appear that you are sure of this action.
And that’s it, the member’s admin role has been removed. If you wish to add another member as administrator, repeat the above steps but this time choose the Add admin option.