created a hyper-v then imported a VMDX provided by the vendor

Created a hyper-v then imported a VMDX provided by the vendor.  When this VM is started up, the NIC was configured. The vendor application installed as well.

The vendor provided a VMDX which goes online as a linux machine.  It starts up then we add a IP in the same subnet as the hyper-v host.   The IP added was pinged and nslookup to confirm no other devices are using this IP.  We added valid
DNS servers.  The vmdx was imported as a COPY (create new ID for virtual machine).   Virtual switch is set as External and no other options are chosen.

The hyperv host can ping other network servers however this linux VM cannot ping or nslookup anything.  This Linux VM cannot even ping the default gateway.

This hyper-v host is in Azure and we have confirmed the network security group (NSG) is configured identical to other working NSGs.

Please recommend how to get this server to communicate.  Is there something wrong with the virtual network switch??


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