hello everybody.sorry for my english
i have 2 mikrotik with hotspot server and usermanager are connected as radius via pptp link
1St Mikrotik as server with hotspot and radius with pptp server
2nd Mikrotik as server with hotspot and radius connected to 1St mikrotik via pptp-client
how i can open the radios (UBNT) are connected to 2nd Mikrotik from 1St Mikrotik?
the ranges of radios is 172.30.32.0/24

you need to build L3 connectivity to your UBNT radio you can try to add IP on one of the router and route ke IP via that router

How this way
some details please?