The Azure team has released the much awaited Azure AD Connect binaries for download.
Azure AD Connect is the single tool going forward for connecting your on premises directories to Azure AD, whether you are evaluating, piloting or in production.
The Express Settings in the tool will let you connect a single AD forest to the cloud within minutes with just a few clicks.
If you have an existing DirSync installation, you can install Azure AD Connect on the same box and the software will pickup that you are running DirSync & will upgrade it.
Download the Azure AD Connect binaries from here.