virtual machines – VM cannot access network on new Hyper-V Host

I re-built an existing Hyper-V host server on Windows Server 2016 to move to a larger SSD RAID for storage (required OS re-install). The host itself is on the domain and accessible via RDP all looks well. I then copied a test VM to the host and it starts up, but has no network connectivity. I tried deleting and re-creating the virtual switch, but still no luck. The virtual switch is on NIC3, external network, and “allow management operating system to share this adapter” is unchecked. These settings are exactly how it was configured before and I am using the same NIC as before. I cannot ping the VM from the host, nor can the VM ping the gateway or any other IP on my network. Any ideas on what to look at?