To remove a colleague from your Karbon account, you will need to be an account Admin.
On the main menu, click Settings > Colleagues and then select the colleague you'd like to remove.
You'll then see the colleague's profile.
Click on Archive User.
Choose the colleague who will own the removed colleague's assignments.
A Window will come up with a list of reasons why you are removing this user
Click Archive User & Reassign Items
The colleague will be removed from your Karbon account.