The fleet manager resource used to be auto generated like the fleet member resource. But it was using a preview api-version at beginning, the service team was asking to switch to a stable version. So the dns prefix feature was deprecated and not passed to the API anymore.
The fleet manager resource used to be auto generated like the fleet member resource. But it was using a preview api-version at beginning, the service team was asking to switch to a stable version. So the dns prefix feature was deprecated and not passed to the API anymore.