Hello Don Curry,
Welcome to microsoft Q&A, thankyou for posting your query here.
In Azure portal, go to your VM's page, and look for the "Support + troubleshooting" section, then click on "Serial console."
Using CLI try to reset the DHCP setting for eth1.
Sudo nmcli device
## to display all the network device connected.
sudo nmcli connection
## to display the connections in the network
sudo nmcli connection show id <connection-name>
##to display properties of the connection.
sudo nmcli connection modify <connection-name> ipv4.method auto
# to fetch and configure all DHCP and DNS requirements.
sudo nmcli connection down <connection-name>
sudo nmcli connection up <connection-name>
## to reactivate the connection
Sudo systemctl restart NetworkManager
## to restart the serivce.
ip addr show eth1
## to display the ip address of the eth1
Hope this answer is helpful