Microsoft Entra ID is the new name for Azure Active Directory (Azure AD). The rename and new product icon are being rolled out across experiences from Microsoft. Most updates will be complete by mid-November of this year. Resources are also now available to support the renaming of your product experiences.
Additionally, Identity emails will now be sent from Microsoft Security (MSSecurityfirstname.lastname@example.org). The emails are currently coming from Microsoft Azure (email@example.com). You may need to update Outlook rules as a result.
Source: Microsoft Azure – aggiornamenti