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Hybrid Identity Authentication & Entra Connect

Hybrid identity model & directory synchronisation is the most common for enterprise users

  • Directory synchronisation allows updates to AD DS to synchronise with the Entra ID
  • AD DS identities are synchronised with Microsoft 365 and users are managed on-prem

Managed Authentication

Password Hash Synchronisation (PHS) (Recommended)

Entra ID handles authentication using a locally hashed password

  • Password hashes are synchronised out from AD DS to Entra ID so that users have the same password

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Pass-Through Authentication (PTA)

Entra ID sends the credentials to an on-prem software agent to be authenticated by AD DS 

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Federated Authentication

Federated Authentication - Entra ID redirects the client's authentication request to another identity provider

  • Primarily for large enterprises with more complex requirements
  • Users have the same password on-prem and in the cloud and do not have to sign in again to use 365
  • Supports additional requirements such as smartcards or third party MFA

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