changing nameservers to point to Azure

I need to move the nameservers of one of my domains to Azure. I just need to confirm that creating a new DNS zone file
 on Azure and setting up records will not be in use till I change the nameservers from my other console to point to Azure nameservers... I am only worried that my current Azure services will use the new zone before I change the nameservers... I know this is
 basic and it won't happen but I want to be sure...