virtual network service endpoint - azure-virtual-network

Question

I have a virtual network in my resource group with the default subnet Microsoft Storage Service endpoints are already assigned to the default subnet of the virtual network but, now I want to add another multiple service endpoint with default subnet using PowerShell
The code below is what I'm using to add the service endpoint Microsoft.ServiceBus to the same virtual network.
#Get vnet
$virtualnetwork = Get-AzureRmVirtualNetwork -Name $VN -ResourceGroupName $RG
#Configure service endpoint
Add-AzureRmVirtualNetworkSubnetConfig -Name $SN -AddressPrefix $SAP -
VirtualNetwork $virtualnetwork -ServiceEndpoint $EP
#Set configuration
$virtualnetwork | Set-AzureRmVirtualNetwork
The issue is that every time I run the above script, it updates the current service endpoint rather than adding a new one. Any idea

Answer 1

I tried to reproduce the same in my environment and added the service endpoint successfully like below.
I have created microsoft.storage service endpoint with default subnet like Below.
I tried to add another service endpointMicrosoft.ServiceBus to the same virtual network with default subnet using below powershell script
$subscription = "ID"
$subnets = #('default')
$vnetName = "your vnetname"
$vnetRgName = "Rgname"
$newEndpoint = "Microsoft.ServiceBus"
Set-AzContext -Subscription $subscription
foreach($snet in $subnets){
Write-Host "Modifying Service Endpoints for subnet: $snet" -fore red -back white
$virtualNetwork = Get-AzVirtualNetwork -Name $vnetName -ResourceGroupName $vnetRgName | Get-AzVirtualNetworkSubnetConfig -Name $snet
$addrPrefix = $virtualNetwork.AddressPrefix
#Get existing service endpoints
$ServiceEndPoint = New-Object 'System.Collections.Generic.List[String]'
$virtualNetwork.ServiceEndpoints | ForEach-Object { $ServiceEndPoint.Add($_.service) }
if ($ServiceEndPoint -notcontains $newEndPoint){
$ServiceEndPoint.Add($newEndpoint)
}
$delegation=$virtualNetwork.Delegations
#Add new service endpoint
Get-AzVirtualNetwork -Name $vnetName -ResourceGroupName $vnetRgName | Set-AzVirtualNetworkSubnetConfig -Name $snet -AddressPrefix $addrPrefix -ServiceEndpoint $ServiceEndPoint -Delegation $delegation | Set-AzVirtualNetwork
}
Output:
To check in portal, Microsoft.serviceBus is added successfully with default subnet along with Microsoft.storage.