When adding a user via the admin portal, you might see the above error. When you receive this error, it means that the user already exists in a different ezeep organization. Each user can only belong to one ezeep organization.
If you receive this error, please check with the user if they had previously been printing through another organization's ezeep account, and if they are okay with being removed from the old organization. If they are, you can contact us at firstname.lastname@example.org and CC the user's email, and we can remove the user from the previous organization so you can add them to yours.