Thanks Balaji, Actually one of our client organization had his FTDs managed on our FMC, now that client organization was bought by some other organization and they wanted to manage the network themselves. There Switching and Wireless solution is Cisco based, but not security. So they are not willing to go with FMC. I deleted the FTDs from our FMC and gave them managed device backup along with FTD admin credentials. So, I was thinking of the scenario where FTD from FMC is moved to FDM and just out of curiosity, I wanted to know if there is any method with which FTD won't lose config while shifting from FMC to FDM.
yes agreed with your response, in that customer taking risks, as mentioned covering Local will erase config(as mentioned by @Marvin Rhoads , so the customer has the config, so they can build manually whatever they like.