There is no built-in Sonos policy.
Airgroup only needs to be enabled when:
- Broadcast filtering is on or:
- Clients are not on the same subnet as the device they are trying to reach.
To narrow down what is causing you problems, you need to (1) make sure clients are on the same subnet as the device they are trying to reach(2) ensure that there is not traffic blocking your clients and your device
(3) Turn Airgroup off to ensure that partial services are not being rendered and break something.
If you want to turn on Broadcast filtering, you would need to (1) Turn on Airgroup (2) Try to discover a device using a client (3) Type "show airgroup blocked-service-id" so that you can see what needs to be added to a new policy to allow your client to device communication. You would then build a new Airgroup Service and add the blocked service ids to that service to allow client to device communication when Airgroup is on.
I hope that makes sense.