When making Marketo API calls to pull fields, some fields do not return. In the examples below, "Source" does not return, and as a comparison, "Lead Source Last" indeed does return.
What is preventing "Source" from returning as a field in our API calls, or what is the best way to further troubleshoot?
The "Source" field does not return when we poll the Marketo API for fields:
To compare, the "Lead Source Last" field indeed does return when we poll the Marketo API for fields: