I was planning on installing Istio on my new AKS cluster. However, in the prerequisites for Istio, it is mentioned that K8S cluster should have RBAC enabled. However, I read that AKS ( preview ) doesn't have it enabled. Is this true? Is there an option for me to try Istio on AKS.
In fact RBAC is not available in Azure AKS currently. According to this GitHub issue it is on the roadmap for Q1 2018.
In Azure you can use ACS which is an older version of AKS, but with control over Kubernetes master or acs-engine where you have full control over Kubernetes cluster.