Migration tool 1.0.0 supports migrating configuration on an standalone FTD only, not HA pair. You need to first migrate the configuration on a standalone FTD and later configure the HA Pair. Even if you are going to migrate the ASA HA pair which is handling the traffic you would like to migrate first standby unit.
You mentioned about a tutorial which explains the configuration can be pushed to HA pair, do you mean from Migration tool it can be pushed to HA Pair? Can you please share the same tutorial?
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