CA Single Sign-On r12.52 End of Service Announcement https://support.ca.com/us/product-content/status/announcement-documents/2017/ca-single-sign-on-r12-52-end-of-service-announcement.html
CA Extended Support, a CA Technologies support offering, that extends support for CA Technologies software product versions or releases that have reached End of Service. CA Extended Support will be available until February 28,2020. Please note, however, that in most cases CA upgrade services will provide a more cost-effective and valued approach than CA Extended Support alone.
Further reading :
CA Single Sign-On (formerly CA SiteMinder) Release and Support Lifecycle Dates https://support.ca.com/us/product-content/status/support-life-cycle/indexes/ca-single-sign-on-release-and-support-lifecycle-dates.html
CA Extended Support https://www.ca.com/content/dam/ca/us/files/service-offering/ca-extended-support.pdf?intcmp=searchresultclick&resultnum=1