We have a HA cluster R77.30, a standalone R77.30 and R80 management server. All 4 VMs are in Azure.
First of all I tried to upgrade the management server. I created a snapshot and R80 migrate export.
I could redeploy the management server with R80.10, however, I wasn't sure I could recover all the settings/policies using R80 snapshot or migrate import.
I tried to use other migrate export tools: R77.x to R80.10 and R80.10 to R80.10. However, I got an error that I couldn't use those tools because I use R80.
There's no migrate tool from R80 to R80.10.