If you have Windows Server vNext Technical Preview installations that are expiring in a day or so, you’ll be pleased to know that Microsoft yesterday addressed this issue and released a patch (as promised). Patch will extend the evaluation period of those installations until the October, 2015.
With the next build just around the corner, maybe you won’t need this patch to last for that long, but… it’s fixed.
Some of us in the MVP community noticed (and finally resolved it, with support from Microsoft people) that the installation of this update on some machines (Hyper-V hosts, in my case) requires that you also (re)activate your Windows installation. If you don’t do it, it may seem that the patch wasn’t applied. Also, remember that this patch needs a reboot or two to be actually “installed”.
Voilà… enjoy your “renewed” Technical Preview (1) machines!