Is this something I did wrong with the GetInvoiceCollection method, or a known bug? Or could it possibly be because we are using a version of Quantify that is currently still being tested?
I’ve fwd-ed this to dev team for Billing Management.
The particular fetch method is a work-in-progress and is currently unused in Quantify Client, which uses InvoiceList.GetInvoiceList. However, this is expected to be fixed in the upcoming release.