Comment Can't migrate just yet (Score 1) 250
Migrating those services would mean shutting off IPv4.
That would mean that every customer that would want to access these services, would have to have IPv6 connectivity. If anything, MicroSoft should encourage their customers to get IPv6 connected, so they can eventually shut off the IPv4 connectivity for their services.
Given the time frame they'll have to observe for their Enterprise customers, an announcement to do the shut down would have to be at least 3 years prior to the shut down date. They can't get away with shutting off more than say 5% of their customers with an action like this, so they can't do that until they have a good indication at what date over 95% of the internet globally will have IPv6 connectivity. Even if the entire planet will start trying to accomplish that really hard all of a sudden, it will be at least two years before the bulk of it will have end to end facilities for IPv6 in place.
This puts a realistic time frame of at least 4, probably more like 5 to 7 years on your suggestion to "migrate to IPv6 so they can free up IPv4 space". That's hardly a solution for a problem they are facing right now, is it?