It affects enterprise computers, as it says in the first sentence. Microsoft's main concern is Windows Server, running databases such as MS SQL or Exchange Server, not ordinary Windows desktops. I don't know whether infections involve ordinary Windows PCs, and therefore whether AV programs detect them. But desktops are not the target.

Linux servers are also affected, e.g. running Hadoop (don't ask!). Linux is not immune from malware, but only 2% of desktop computers run Linux so it's not a popular target. So I and most Linux users do not run AV programs. By contrast, 90% of enterprise servers run Linux.