Forum Discussion
O365 / Azure AD - two accounts for admins v. PIM
You only need the Azure AD license for your admin(s), plus it adds some other goodness such as Conditional access policies, Azure AD identity protection and so on.
To your question, no, generally you don't need to have a license or a mailbox for the admin, there are very few functionalities that will not work without one. Alerts will be sent to the "alternative address" you specify when assigning an admin role.
VasilMichev Ahh wait I first read this message at about 3:30am Sunday morning - are you saying only the admin needs an AD Premium subscription to unlock all that stuff - not every user?
Define "all that stuff"? What I'm saying it that for PIM, you need only licenses for the admins. The other features will have varied license requirements, check the documentation.