On December 5, Microsoft officials said in a blog post that ACS will no longer be supported as of January 31, 2020. Beginning on that date, all ACS application programming interfaces (APIs) will be blocked. Users will no longer be able to create new clusters, or update or scale existing clusters. They will be able to list and delete existing clusters.
Microsoft’s recommendations for existing ACS users are to migrate to AKS or the ask-engine open-source project if they use Kubernetes.
If they use ACS with Docker, then Microsoft suggests moving to the Basic or Standard/Advanced Docker Enterprise Edition for Azure solution template.
If they use ACS with DC/OS, then they advocate that users move to the Mesosphere DC/OS Enterprise or Mesosphere DC/OS Open Source solution template
