Prevent standard users from creating subscriptions in Azure - Microsoft Q&A
AllowAdHocSubscriptions
Azure Subscription Migrations - Jack Tracey - Cloud & Networking
MCA vs CSP
Microsoft Customer Agreement Setup
Transfer Azure subscription billing ownership for a Microsoft Customer Agreement
Organize your invoice based on your needs
Transfer an Azure subscription to a different Azure AD directory
Transfer Azure subscriptions between subscribers and CSPs
Move resources to a new subscription or resource group - Azure Resource Manager
Multi-partner support - Partner Center
General Partner Incentives
Link a partner ID to your account that’s used to manage customers