Documentation sure is lacking or hard to find.
As far as I understand there are two ways to setup IMC HA, that is stateless and statefull.
Statefull requires some kind of cluster, not sure if it is an IMC cluster service or MS cluster service.
Stateless requires the Active IMC to do backup and the standby IMC to do restore.
Default you can only do it once a day, you can script it more frequently.
You can transfer via SMB share or FTP.
I do fail to see how you can shift the IMC IP address to the Standby server or what about sub servers, well they will work if the IP address shifts to the standby server.
#HAHigh-Availabilitybackuprestoreimc