Thank you for the post. There is no Windows 10 driver for ET Dual port server adapter.
For the ISCSI boot, please make sure the ISCSI boot is enabled on the network adapter, use the
"iSCSIUtl -flashenable"command to enable the flash ROM and update the adapter. Here is the site to download the preboot.exe Intel® Download Center,this is the tool you can extract to enable the iscsi boot on the network adapter.
You may refer to this site about ISCSIC remote boot issue for more information. Network Connectivity — How Do I Troubleshoot Intel® iSCSI Remote Boot Issues?
Hope this helps.