The new Dynamics 365 for Customer Engagement update, July Update v. 9.0, is available now.
New instances or reset sandboxes can be configured to that version. The update for existing instances will be available within next weeks. No details about on-premises availability yet.
July 2017 update for Dynamics 365 brings:
Some features are not fully available yet and will be rolled out within next days. This functionalities as well as known issues are listed here: https://docs.microsoft.com/en-us/dynamics365/customer-engagement/admin/readme-9