Get-AzureLoadBalancerHealthReport

<#
.SYNOPSIS
    Reports backend health for all Azure Load Balancers.

.DESCRIPTION
    Checks health probe configuration and backend pool membership for
    every load balancer in the subscription, so a backend that has been
    silently unhealthy is caught before users start reporting
    intermittent failures.

.EXAMPLE
    .\Get-AzureLoadBalancerHealthReport.ps1

.NOTES
    Requires the Az.Network module and an active Connect-AzAccount session.

.AUTHOR
    Shehryar Hassan
#>

$lbs = Get-AzLoadBalancer

$report = foreach ($lb in $lbs) {
    foreach ($pool in $lb.BackendAddressPools) {
        [pscustomobject]@{
            LoadBalancer  = $lb.Name
            BackendPool   = $pool.Name
            MemberCount   = $pool.BackendIpConfigurations.Count
            ProbeCount    = $lb.Probes.Count
        }
    }
}

$report | Format-Table -AutoSize
$report | Where-Object MemberCount -eq 0 | ForEach-Object { Write-Warning "$($_.LoadBalancer) / $($_.BackendPool) has zero backend members." }