Azure AD free
Azure AD free supports common features such as these:
- Up to 5,00,000 directory objects, which could be users, devices, applications, or groups
- User/group management (add/update/delete), user-based provisioning, and device registration
- SSO for up to ten applications per user
- Self-service password changes for cloud users
- Connect and sync with on-premises AD DS
- Up to three basic security and usage reports