Microsoft Entra Hybrid Join is an identity solution that allows devices to authenticate in both a Windows Server Active Directory domain and Microsoft Entra ID. This provides companies with the flexibility and security they need to effectively manage resources while ensuring a high level of security.
Microsoft Entra ID is built with global high availability. In conjunction with features such as seamless single sign-on (SSO) or Microsoft Entra Conditional Access, Microsoft Entra ID offers additional features that significantly increase security and can only be implemented at a high cost with a pure Windows Server Active Directory infrastructure.
With Microsoft Entra Hybrid Join, you get the best of both worlds (local and cloud) at the same time. The device has access to both Windows Server Active Directory and Microsoft Entra ID.
This blog article shows in detail the steps for configuring Microsoft Entra Hybrid Join.