ConnectWise Manage doesn’t sync POs, but syncs packing slips (IE: item receipts). They add to inventory. QuickBooks Online POs don’t add to inventory, but Bills do. So syncing ConnectWise purchases to QuickBooks Online as POs would cause the inventory counts to not match between Manage and QuickBooks Online.
The way the ConnectWise Manage API expects this to be used is POs and Item Receipts are handled in Manage, and then the transactions are synced to the accounting system after the items are received.
To avoid confusion to customers, we do put the PO Number that is in Manage into the Memo field in QuickBooks Online. (see below)
PO Number > Memo Field
Packing Slip Number > Memo Field
Vendor Invoice Number > Bill Number