Adding a Co-administrator via PowerShell

Question

I know how to add a co-administrator via the portal, but need a way to add it via PowerShell.

I need this method as I have lost access to the login id, but have the

Answer 1

Azure have rolled out Roll Based Access Control which will allow you to automate the adding of new admins to your Azure Subscription. Intro here: https://azure.microsoft.com/en-us/documentation/articles/role-based-access-control-configure/

You would add a new user as an Owner at the Subscription scope. These operations are available using both PowerShell and REST