There are two syncing agents [[Entra Connect Sync]] and Entra Cloud Sync. * [[Entra Connect Sync]] (AD Connect) * 1 agent per EntraID tenant * Forests must be connected * No active/active HA * 30 minute sync cycle * [[Entra Cloud Sync]] * Multiple agents * Active/active HA for Password Hash Sync * Multiple disconnected forests * No EntraID Hybrid join * 2 minute sync cycle > [!My Opinion] > I believe AD Connect still has a place, especially for [[Entra Hybrid Join]]. However, since you can run both agents on the same tenant Cloud Sync makes sense on BDCs for higher availability password hash syncing. Sources: - [What is Microsoft Entra Connect cloud sync? - Microsoft Entra | Microsoft Learn](https://learn.microsoft.com/en-us/azure/active-directory/hybrid/cloud-sync/what-is-cloud-sync#comparison-between-microsoft-entra-connect-and-cloud-sync) - [Azure AD Connect Sync and Cloud Sync, What’s the Difference? (youtube.com)](https://www.youtube.com/watch?v=aAZ4QXV7Wy0)