Redistribute a route into other networks

Hi,

Apologies for what seems a simple question - not 100% sure of how to do this on a fortigate. Also, apologies if this doesn't make sense....too much going on.

I have a fortigate with peering into 4 networks each network interface is configured for BGP for routing.

One of the networks has the default route for that network enabled "capability-default-originate enable".  Routing to that is a /27 network which I can see in the routing table.

Of the 3 remaining networks I need to redistribute the /27 into two of these networks so we can route traffic across. The 3rd network is to internet so the default route out of the firewall.

Any advice how to do this?

Regards

Adrian