Manage Expired users
Users whose access has expired remain on your account, but do not take up your available seats.
By default the users are not visible. To show them tick the 'Show Expired' check box.
You can re-activate a user by clicking the Action Menu (three dots) next to their user name and selecting 'Reactivate User Access'. They'll receive an email letting them know their account is active (https://help.glean.co/article/309-access-reactivated-email)