The DNS server that you have added in the CLI is not able to resolve the Domain Name(INSAT.LOCAL) that you have entered when trying to configure the AD in the ISE GUI.
You should make sure that your DNS servers knows about this domain and can...
You won't be able to use an ISE Admin user to login to your Network Devices (using TACACS or RADIUS). These users are in a different database.
You will need to create separate users under the Device Administration to use them for NAD d...
The upgrade sequence is correct.
1. You should upgrade your Primary Admin Node first.
2. If there are separate Monitoring Nodes, then Primary Monitoring Node should be upgraded next.
3. Secondary Monitoring Node ( if there is one)
3. If n...