/InstanceName:"name_of_the_instance" Optional. Specifies the name of the instance that you are creating. By default, the ...

/InstanceName:"name_of_the_instance"
Optional. Specifies the name of the instance that you are creating. By default, the AD LDS instance is named "Instancen" where n is the lowest number greater than 0 such that Instancen is unique on the local computer.