OK just figured this out:
Go to Dialplan > Inbound Routes
or to Dialplan > Outbound Routes
and select your chosen route.
Scroll down to the dial plan, after effective_caller_id_name= has been set (and before the final destination is specified) add this into the dial plan:
action | set | record_session=true
Call recording will then be enabled and accessible via the CDR App
Go to Dialplan > Inbound Routes
or to Dialplan > Outbound Routes
and select your chosen route.
Scroll down to the dial plan, after effective_caller_id_name= has been set (and before the final destination is specified) add this into the dial plan:
action | set | record_session=true
Call recording will then be enabled and accessible via the CDR App