I'm trying to get my PCs to download Windows Defender definitions from my WSUS server. WSUS has downloaded the definitions and it shows the client computers need the definition updates.
I've configured a GPO for WSUS, and for Windows Defender definitions updates I've enabled the setting: Define the order of sources for downloading definition updates" and entered a value of "InternalDefinitionUpdateServer".
The problem I'm having is that on my Win10 computers, when I go to Settings > Update & Security > Windows Security > Virus & threat protection > Check for updates, the updates fail to download. Checking the Windows Defender Event Viewer log I get an error 0x80072ee7 "The server name or address could not be resolved".
I've done a lot of searching but haven't found anyone posting a similar issue. What am I doing wrong? Does there need to be a DNS entry for InternalDefinitionUpdateServer or does it need to be defined somewhere? I'm not sure how the client knows what the address of the InternalDefinitionUpdateServer should be.