The California ISO released a new urgent mandatory Automated Dispatch System (ADS) client version 220.127.116.11. The new version contains a critical security certificate update. Market participants are required to install this new version as soon as possible to enable ADS connectivity to the ISO production or MAP-Stage environment. All existing ADS client software functionality will remain unchanged, with this new version. Prior client versions will be unable to connect to ADS, and will not be supported going forward.