For all of who wait for a first SP before you deploy new version of Exchange Server, think again. While Microsoft will still ship Service Packs for Exchange, they also decided to go with more frequent updates, released quarterly, in order to fix most significant bugs, but also to provide new functionalities.
Yesterday, Cumulative Update 2 for Exchange Server 2013 was released, and besides fixing some known (and unknown) bugs, it provides pretty much of new and enhanced functionalities. In these areas, Microsoft has provided new or improved functionalities:
CU2 can be downloaded here: Exchange Server 2013 CU2. As before, this is full install, rather then just an incremental upgrade, but you can use it for both purposes – green field installation or upgrade of existing Exchange 2013. Microsoft still didn’t publish release notes for CU2, but pretty good overview of what’s new can be found here.