Multi-Period Accounting - Handling PO Backed Invoices

Content

With prepaid cloud services accounting changes coming quickly we are looking at using multi-period accounting. However there appears to be a gap when trying to do this with PO backed invoices. How are others handling multi-period accounting when matching to a PO? 

We would prefer to have this functionality in self service procurement and purchasing to collect this upfront and have it flow through to payables.

Anyone have ideas on how this could work with the requisition through to invoice to minimize accounting needing to reclass lines or other manual work arounds?