How to dynamically add participants to a live Corda network

How to add more merchant company nodes to the existing network in Corda 4.8 without shutdown Corda network?

We use Corda network bootstrap for creating network. but stuck to add new node without shutdown existing Corda network.

Unfortunately, with Corda community version. You cannot add network participants dynamically. With Corda Enterprise Network Manager, you can.

So this means all nodes need to be set in initial phase? Suppose we have a running blockchain and we will have a new customer, how we can add it to our Corda blockchain community version? it is not possible at all? Can you please more elaborate on that?