As an admin, you can remove members from your organization's account. On the All Members tab of the Organization page, you can see a list of all your users (Members), search through them, and remove members.
Hover over your profile icon and click on Organization from the dropdown. Then click on the Members tab.
You can utilize the search bar to find the email address of the member that you're wanting to remove. Once you find the member that you want to delete, then click on the Remove trash can icon. This will open the Remove License popup window.
When needed, select in the Reassign dropdown the existing member who will become the new owner of any files owned by the selected member to delete. This notification will only appear if you're deleting a member who is currently the owner of any documents.
Then click on Continue to finalize removing the member. The system will provide confirmation that the member has been removed.