Remove access to your space for an individual user easily
*This permission is only available to Office Administrators.
To remove someone from one of your spaces, first open the People menu in the top lefthand corner of your screen. This will open a list of current users with access to this space.
On the righthand side next to their name, you'll see a "Kick user" button.
You'll receive a pop-up message confirming you want to kick this user, as well as the option to include a reason why they are being removed. The user will receive a message informing them you have removed them from the space. Your reason why is included as well, so make sure to phrase it in a way that is appropriate for them to see.
*Note: This process removes the user from the specific space. Unless you remove this user from your organization entirely, they will still be able to rejoin the space if you so choose in the future.