With a valid license
At startup, the Microgateway runtime container logs the following message, containing the expiration date.
{ "@timestamp":"2021-06-28T12:42:26.155+0200", "priority":"info", "pid":"13", "program":"SG_master", "log_id":"SY-SG-CONF-170", "log_cat":"C", "message":"License: valid for ethernet addresses : Policy Enforcement on, ICAP off, Kerberos off, Machine Learning off, API Gateway on, Microgateway on, unlimited authenticated sessions and unlimited backend applications. Expiry date [...]" }