An expiry warning will be displayed when there is less than 60 days until your license key expires.
Leading up to the expiration of your GRANTA MI license key, MI:Viewer automatically displays a warning to any administrator with the appropriate privileges. An expiry warning will be displayed on logging in when there is less than 60 days until the license key expires.
Note that there is no grace period, and users will not be able to use MI:Viewer after the license key has expired.