Interestingly, that field was added in version 2018.2, per the API release notes:
AccountRight 2018.2 | release notes – Support for the MYOB family of SME product APIs
The “OnlinePaymentMethod” field can be set to “All” to enable online payments for a given invoice. This only applies if clients have set up online payments. The field will default to “None” in 2018.2 and “All” in 2018.3.
Mike_Jamesand CassG So now I am confused. The email from Support regarding my case said to enter "Null" and the example on the release notes for 2018.2 showed to enter "Null" (on the right hand side of the page), but when hovering over the OnlinePaymentMethod attribute, a pop-up shows to enter "None", and the release note excerpt pasted above also shows the word is "None". I have emailed support to ask for clarification and confirmation. Yet more frustrating delay in getting this mess solved once and for all. Sheesh!
