Microsoft today released for general availability the Dynamics 365 Channel Integration Framework. This framework enables you the ability to integrate third party channel providers or channel aggregators into Unified Interface Apps.
You can find the full release article on MSDN https://blogs.msdn.microsoft.com/crm/2018/12/10/dynamics-365-channel-integration-framework-bring-your-own-channel-provider-with-ease/
Dynamics Bing'd 