System Center Configuration Manager 1602 has now been released and you can easily upgrade to it by going into your Configuration Manager 1511 console and browsing to:
Administration > Cloud Features > Updates and Servicing
Then in there you should see the new version available for pre-req checks and installation:
To install, simply highlight the update and click the Install Update Pack. Then run through the wizard.
If you have any comments or questions about this update, please feel free to leave us a message below using our comments system.