New-CloudBinReport.ps1

Add-PSSnapin -Name VeeamPSSnapin

function New-CloudBinReport
{
    $report = New-Object -TypeName System.Collections.Generic.List[PSCustomObject]

    $tenants = Get-VBRCloudTenant
    foreach ($tenant in $tenants)
    {
        if ($tenant.ResourcesEnabled)
        {
            $tenantQuota = [Veeam.Backup.Core.CTenantQuota]::DbFindByTenantId($tenant.Id)
            if ($tenantQuota.CachedRepository.Type -eq "ExtendableRepository")
            {
                $binSize = 0

                $extents = $tenantQuota.CachedRepository.GetExtents()
                foreach ($extent in $extents)
                {
                    $binPath = [Veeam.Backup.Model.SPathConverter]::RepositoryPathToString(
                        $extent.FullPath.Combine(
                            [Veeam.Backup.Common.CPartialPath]$tenantQuota.AbsoluteRecycleBinPath
                        ),
                        $extent.Type
                    )
                    $repoAccessor = [Veeam.Backup.Core.CRepositoryAccessorFactory]::Create($extent)
                    $binSize += $repoAccessor.FileCommander.GetDirSize($binPath)
                }
            }
            else
            {
                $binPath = [Veeam.Backup.Model.SPathConverter]::RepositoryPathToString(
                    $tenantQuota.AbsoluteRecycleBinPath,
                    $tenantQuota.CachedRepository.Type
                )
                $repoAccessor = [Veeam.Backup.Core.CRepositoryAccessorFactory]::Create($tenantQuota.CachedRepository)
                $binSize = $repoAccessor.FileCommander.GetDirSize($binPath)
            }

            $tenantReport = [PSCustomObject]@{
                tenantName = $tenant.Name;
                binSize = $binSize
            }
            $report.Add($tenantReport)
        }
    }

    return $report
}

New-CloudBinReport | Format-Table -Property @{Expression={$_.tenantName}; Label="Tenant"},
    @{Expression={[System.Math]::Round($_.binSize / 1GB, 2)}; Label="Bin size (GB)"}