There’s a macOS tool called AssetCacheLocatorUtil located at /usr/bin/AssetCacheLocatorUtil. The output is in… stderr. Because stderr is so fun to work with (note that sed -i only works with stdin). So, to update the caching server(s) you are using and only print the IP address of those, you’d do the following:
/usr/bin/AssetCacheLocatorUtil 2>&1 | grep guid | awk '{print$4}' | sed 's/^\(.*\):.*$/\1/' | uniq
If you use Jamf Pro and would like to use this as an extension attribute, that’s posted here: https://github.com/krypted/cachecheck. I didn’t do any of the if/then there, as I’d usually just do that on the JSS.
