Go to Cisco SSM portal "software.cisco.com" > Manage licenses > Inventory > Licenses then click on the interested subscription licenses you want to check. On the "Overview" page you should see the licenses details alongside the start and end dates, a...
I don't think that would change much because in the end the certificate warning issue would still exist. Adding all the required SANs to the public certificate wouldn't be an option? it should be possible without any issue.
No the traffic passing through the firewalls wouldn't be affected in general however if you are using user ID policies or the firewalls need to rely on the FMC to get a verdict of a file via dynamic integrations with the cloud then it could potential...
I don't believe ISE services will be restarted when you click on "Make Primary" of your standalone node, at least that is what I saw in a lab I ran back in 2019:
https://bluenetsec.com/adding-a-secondary-ise-node/