UPNP and/or port knocking typically aren't available in an enterprise network because they aren't needed or wanted. Neither of those is necessary for P2P delive

UPNP and/or port knocking typically aren't available in an enterprise network because they aren't needed or wanted. Neither of those is necessary for P2P delivery of updates, though. I think they turned it off by default for those customers because Microsoft knows the ass chewing they'd get if they didn't. Besides, a typical large enterprise is already going to have a system in place to handle the delivery of updates (e.g., WSUS, SCCM, or whatever they're using/calling it nowadays) to PCs such that the bandwidth savings aren't going to as noticeable.