Use gateway for data sources on an Azure Virtual Network (VNet)
This article describes the AlwaysUseGateway server property for use when data sources are on an Azure Virtual Network (VNet).
Server access to VNet data sources
If your data sources are accessed through a VNet, your Azure Analysis Services server must connect to those data sources as if they are on-premises, in your own environment. You can configure the AlwaysUseGateway server property to specify the server to access all datasource data through an On-premises gateway.
This property is effective only when an On-premises data gateway is installed and configured. The gateway can be on the VNet.
Configure AlwaysUseGateway property
In SSMS > server > Properties > General, select Show Advanced (All) Properties.
In the ASPaaS\AlwaysUseGateway, select true.