Get-AzFirewalls.ps1

# Initialize an empty array to hold firewall information
$allFirewalls = @()

# Get all subscriptions in the tenant
$subscriptions = Get-AzSubscription

# Loop through each subscription to gather Azure Firewall information
foreach ($subscription in $subscriptions) {
    # Select the subscription for the Azure context
    Set-AzContext -Subscription $subscription.Id

    Write-Host "Checking subscription $($subscription.Name) for Azure Firewalls..."

    # Get Azure Firewalls in the current subscription
    $firewalls = Get-AzFirewall

    # Loop through each firewall and gather necessary information
    foreach ($firewall in $firewalls) {
        $firewallInfo = [PSCustomObject]@{
            SubscriptionName = $subscription.Name
            SubscriptionId   = $subscription.Id
            FirewallName     = $firewall.Name
            ResourceGroup    = $firewall.ResourceGroupName
            Location         = $firewall.Location
        }
        $allFirewalls += $firewallInfo
    }
}

# Display the Azure Firewalls
$allFirewalls | Format-Table -AutoSize

# Optionally, you can export this data to a CSV file
# $allFirewalls | Export-Csv -Path 'AzureFirewalls.csv' -NoTypeInformation