How does Microsoft Azure ensure Secured Data Migration to the Cloud?

Hey AashimaSharma 

This is a bit of a read but check out the link https://learn.microsoft.com/en-us/compliance/assurance/assurance-datacenter-security

Microsoft has the shared responsibility model as well https://learn.microsoft.com/en-us/azure/security/fundamentals/shared-responsibility

But to sum it all up, Microsoft will ensure that the datacenters, environment and physical security are secure. But the data is the customer responsibility within Azure, so if you upload data or configure something within Azure and you misconfigure or open up a service within azure to the world and your data is taken, that's on you.

Microsoft will provide assistance around this and give you generally good support on how to configure and use there services with there best practice. I've never had any issues with Azure or there support during my career...but this is my own experiences. Check it out for yourself