Azure data file back-ups

Azure automatically stores your Azure SQL Database and Azure Storage data three times redundantly within different fault domains in the same datacenter. If geo-replication is used, it is stored three additional times in a different datacenter.

Question 1): How can I determine if geo-replication is being used for my Azure based customers?

Question 2): How far back "in time" do the archival back-ups go?  For instance, can one of my customers depend on the ability to provide them with a back-up from 2 months ago, 6 months, 1 year, etc...

Thanks!