Amazon RDS for SQL Server Supports TempDB configuration replication

Amazon RDS for SQL Server now supports TempDB configuration replication for Multi-AZ database instances. With this new feature enabled, we will synchronize TempDB file configurations on the primary host, such as type, name, physical_name, size, max_size, growth, and is_percent_growth, with the secondary host in a Multi-AZ configuration. 

Source:: Amazon AWS