Amazon RDS supports Multi-AZ for SQL Server Developer Edition

Amazon Relational Database Service (Amazon RDS) for SQL Server now supports Multi-AZ deployments using Always On Availability Groups for SQL Server Developer Edition. Multi-AZ deployments maintain a synchronous standby replica in a different Availability Zone and provide automatic failover during infrastructure failure. You can use this capability to build and test high availability configurations in non-production environments using Developer Edition, which includes all the functionality of Enterprise Edition at no license cost.