Change IP address of FMC HA standby node

[mumbles202]

I have a pair of FMCs in HA with a few devices registered and failover is working as expected.  I need to change the ip address of the standby unit so had some questions:

1.) To re-establish HA, do I need to break HA on both devices (at the moment they're isolated from each other), then re-establish HA from the primary to the standby?

2.) For the managed devices, will they all get the new ip assignment on the next deployment?

[mumbles202]

I'll be working on this today.  Should I expect any service interruption when breaking the HA cluster since it's only the FMC HA changing, and not the actual unit configuration?  I expect I might have to redeploy to the FTDs so they're made aware of the removal and addition of the new standby unit?  But wanted to confirm if I need to do this during a maintenance window or if mid-day shouldn't be an issue.

[MHM Cisco World]

Upgrade FTD HA Pair on Firepower Appliances - Cisco

check this link it can help you in your task. 

[mumbles202]

Thanks for the link.  The FTDs are staying in place as is, and the primary FMC is currently speaking to all of them.  I need to change the ip of the standby FMC so i was planning to break the HA on both FMC, then change the ip on the standby unit, then reboot the standby FMC and then re-setup the HA between the 2.