A company is planning to set up an Enterprise Azure Subscription. Do they need to have a valid Microsoft Azure account on EA Portal (https://ea.azure.com/) for associating the Azure Subscription?

Answer options:

A.Yes
B.No

Answer – A 
When you sign in to an Azure account, you need to sign in with a valid Microsoft account, as shown below. 

This could be a Work, School or Personal account. The Enterprise Agreement subscription provides a means on how resources get billed for the subscription. 
One can contact Microsoft for the Enterprise Agreement via the following URL- 

https://docs.microsoft.com/en-us/azure/cost-management-billing/manage/ea-portal-get-started