[keypusher]

My guess is that someone at MS was testing Windows Updates or other changes from a local source. They also had some other DNS updates in their config they were testing. They took all of their config and pushed it out, when they should only have taken the other changes.

[fsckboy]

I hope that's not their workflow, but few people I've ever worked with have know how to create operating procedures that had half a chance of succeeding, usually it's based on "oh, don't worry, i would never do that"