Generates a CSV file with all Azure peered VNets

Get-AzVnetPeeringAsCSV.ps1

<#
    .SYNOPSIS
        Retrieves a list of VNet peerings and exports it as CSV.
    .DESCRIPTION
        Retrieves a list of VNet peerings and exports it as CSV. 
        Make sure you are logged in the right Azure Tenant/Subscription before running this script.
    .PARAMETER ResourceGroupName
        The name of the Resource Group
        Example: "my-azure-resource-group"
    .PARAMETER VNetName
        The name of the Azure Virtual Network
        Example: "my-azure-vnet"
    .PARAMETER CSVPath
        Full path to the CSV file.
        Example: "C:\my-report.csv"
    .PARAMETER Delimiter
        The delimiter char of the CSV file (default: ,)
    .PARAMETER Encoding
        Character encoding option (default: UTF-8)
    .NOTES
        Version: 0.1.0 (2022-11-04)
        Author:  Emerson Navarro ([email protected])
        Created: November, 2022
#>

[CmdletBinding()]
param(
    [parameter(Mandatory = $true)]
    [String]
    $ResourceGroupName,
    
    [parameter(Mandatory = $true)]
    [String]
    $VNetName,

    [parameter(Mandatory = $false)]
    [String]
    $CSVPath = "$(Get-Date -UFormat %Y-%m-%d)_PeeredNetworks.csv",
    
    [parameter(Mandatory = $false)]
    [String]
    $Delimiter = ",",
    
    [parameter(Mandatory = $false)]
    [String]
    $Encoding = "UTF8"
)

$peer = Get-AzVirtualNetworkPeering -ResourceGroupName $ResourceGroupName -VirtualNetworkName $VNetName

$peer | Select-Object @{
    name       = "Name";
    expression = { $_.Name }
},
@{
    name       = "PeeredRemoteAddressSpace";
    expression = { $_."PeeredRemoteAddressSpace"."AddressPrefixes" }
},
@{
    name       = "RemoteVirtualNetworkName";
    expression = { $_."RemoteVirtualNetwork"."Id".Split("/")[8] }
},
@{
    name       = "RemoteVirtualSubscriptionId";
    expression = { $_."RemoteVirtualNetwork"."Id".Split("/")[2] }
},
@{
    name       = "PeeringState";
    expression = { $_.PeeringState }
} | Export-Csv $CSVPath -Delimiter $Delimiter -Encoding $Encoding -NoTypeInformation -NoClobber -Force