SharePoint SaaS vs PaaS

Thanks for your reply and help, so it will be like the below diagram ?

This is an implementation of SharePoint Server farm in a hybrid environment by using Azure VMs (IaaS).

The setup consists of multiple virtual machines (VMs) organized into availability sets, ensuring redundancy and fault tolerance.

The on-premises network is connected to the Azure Virtual Network through a VPN Gateway, allowing secure communication between on-premises resources (such as Active Directory Domain Services (AD DS)) and Azure-based components. The AD DS trust relationship enables authentication and identity management for users accessing SharePoint resources in Azure.

The SharePoint deployment consists of multiple tiers:

1. Web Front End (WFE) Layer: Load-balanced VMs handle user requests and serve web content efficiently.
2. Distributed Cache Layer: Caching services improve SharePoint performance by reducing database queries.
3. Application Layer: This hosts SharePoint services and business logic.
4. Search Layer: Dedicated VMs provide indexing and search functionality.

A Windows Server Active Directory (AD DS) deployment within Azure ensures identity services are available even if the on-premises AD is unreachable. The SQL Server Always On Availability Group guarantees high availability and failover protection for the SharePoint databases, with a majority node ensuring cluster stability.

Additionally, a Jumpbox VM is used for secure remote management of the environment, and Network Security Groups (NSGs) protect the resources by restricting network access. The architecture ensures resilience, scalability, and performance optimization for hosting SharePoint on Azure IaaS.

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hth

Marcin