Get a customer
$customer = Get-PCCustomer -tenantid '<tenant id GUID>'
Get all customer subscriptions
Get-PCSubscription -tenantid $customer.id -all
Get a customer subscription
Get-PCSubscription -tenantid $customer.id -subscriptionid '<subscription id GUID>'
Get all customer subscriptions from an order
Get-PCSubscription -tenantid $customer.id -orderid '<order id GUID>'
Get all customer subscriptions from a reseller (available only for Distributor CSP Account)
Get-PCSubscription -tenantid $customer.id -partnerid '<MPNID>'