Upgraded UTM hardware but RED endpoints not coming back up

Question

I upgraded the UTM to a newer bit of hardware and restored the config just using a backup/restore (without License, passwords, certificates/keys, endpoints) 
 when I switch over to the new device everything works fine apart from the RED10 endpoints don't come back up. 
 I have checked the config for the RED devices and it is identical to the previous firewall so I am guessing that I probably need to copy over a certificate somewhere? 
 looking at the live log for the RED devices I keep on seeing "Unable to fetch RED ca object" 
 any ideas?

AaronDavies · Answer

I had a similar issue and ended up with the 'ca_generate_host_key_cert' error (and found this page via a google search). Here was my fix: 
 
 Note all the RED details including unlock codes. 
 Turn off the RED capability (RED management - Global Settings - RED status - off). 
 Turn RED back on again & it will (tada) create a new certificate on the online service. 
 Re-input the RED details. 
 
 I think my issue was the RED certificate was generated with a different hostname on the unit (it had an update issue which meant it was rebuilt & restored several times). 
 Hope this helps someone.