Where are Bentley Cloud and Web Services Hosted?

Hi

From what I'm reading I get the sense that Azure is used to host the ProjectWise CONNECT servers/services environment, but I don't know yet if the Bentley Could and Web Services (Connection Services, Project Sharing, Deliverables Management (Transmittals), etc.) are also hosted in Azure. Is there a wiki, readme or Greenbook that would help me with my research? I'm looking for data center security details.

Thanks and take care,

Shayne