I have a standby firewall which is not connected in live network as if now only Primary ASA is live,i have just installed once secondary ASA for failover testing and it working fine,
As if now the secondary firewall is out of network (on my office desk) whatever i configure on secondary firewall and AIP-SSM20,will it be replicated to primary firewall once i connect to live network.
No, the secondary when it comes up it will try to contact and active mate and if the primary is configured for failover then the secondary will go standby and will copy the config from the primary that is active.
As for the AIP, that config is not replicated, each AIP has its own config and the ASA failover does not interfere with it.
I hope it helps.