When you sign up for an Azure subscription, you are automatically assigned the Classic Subscription Administrator position. You have full access to the Azure subscription and can log in with a Microsoft account or an office/a personal account from the Azure subscription's directory. This job has access to the Azure interface and can manage services there with the help of the Azure site, Azure Resource Manager APIs, etc. You can add others as co-admins if they need to sign in and access services using the same Azure subscription. Both the owner and the co-admins have the same access.
Azure AD offers a set of various different admin roles that are responsible for governing different features. These administrators will be able to use the Azure portal to access a wide range of capabilities. The admin's status dictates the functions they can perform, such as modifying users, assigning administrative duties to others, handling domains, and all other tasks that belong to Azure AD resources in a directory.