AR Adjustment doesn't support custom fields

[okmotsan]

There appears to be a contradiction. In the ArAdjustmentCreate class in the WriteXml function it outputs the CustomFields into the XML data. However, in the API docs on the Intacct website there doesn't appear to be support for custom fields for the create_aradjustment XML API call and this seems to be true as when I send the request from .NET with custom fields set for an ArAdjustmentCreate object then I get an error indicating that the custom field node is not expected.

However in Intacct under the Platform Services it does allow me to create custom fields for the AR Adjustment object.

Also the counterpart in the payables (AP Adjustment) does appear to support custom fields.

TL;DR; why doesn't the AR Adjustment support custom fields via the API? It looks partially implemented but broken