Microsoft Entra ID (formerly known as Microsoft Azure Active Directory or Azure AD) is a cloud-based identity and access management (IAM) solution. It is a directory and identity management service that operates in the cloud and offers authentication and authorization services to various Microsoft services such as Microsoft 365, Dynamics 365, and Microsoft Azure.[1] Entra ID provides users with single sign-on experience, regardless of whether their applications are cloud-based or on-premises.
Entra ID offers many authentication methods, including password-based, multi-factor, smart card, and certificate-based authentication. It also includes several security features, such as Conditional Access policies, risk-based authentication, and identity protection.[2]
On July 11, 2023, Microsoft announced the renaming of Azure AD to Microsoft Entra ID to improve consistency with other Microsoft cloud products.[3] The name change took place on July 15, 2023.[4]
Service limits and restrictions [5]
Category
Limit
Tenants
A user can belong to a maximum of 500 AAD tenants.
A user can create a maximum of 200 directories.
300 license-base subscriptions
Domains
No more than 5000 managed domain names.
Resources
(users, devices, identities, applications)
Max of 50,000 Azure AD resources.
Non-Admin user can create no more than 250 resources.
Schema Extensions
Max 256 characters for String-type extensions.
Max 256 bytes for Binary-type extensions.
Only 100 extension values across all types and all applications.
Only User, Group, Tenant Detail, Device, Application and Service Principal entities can be extended.
Applications
Max 100 users and service principals can be owners of an application.
A user, group or service principle can have max of 1,500 app role assignments.
^Bertocci, Vittorio (December 17, 2015). Modern Authentication with Azure Active Directory for Web Applications. Pearson Education (published December 13, 2015). ISBN9780735698482.{{cite book}}: CS1 maint: date and year (link)
^Moniz, Hencita (7 March 2023). "Azure Active Directory and identity management". Skillzcafe. Retrieved 2023-04-10.
^Chik, Joy (2023-07-11). "Microsoft Entra expands into Security Service Edge and Azure AD becomes Microsoft Entra ID". Microsoft Security Blog. Retrieved 2023-07-12.
^
"New name for Azure Active Directory - Microsoft Entra". 29 August 2023.
^barclayn (2023-03-16). "Service limits and restrictions - Microsoft Entra". learn.microsoft.com. Retrieved 2023-06-06.
Further reading
Zaal, Sjoukje (2022). Azure Active Directory for Secure Application Development: Use modern authentication techniques to secure applications in Azure. Packt Publishing. ISBN978-1838646509.
Mayank, Manas; Garg, Mohit (2019). Developing Applications with Azure Active Directory: Principles of Authentication and Authorization for Architects and Developers. Apress. ISBN978-1484250396.
Bertocci, Vittorio (2016). Modern Authentication with Azure Active Directory for Web Applications. Microsoft Press. ISBN978-0735696945.
External links
Official website
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