Hi Darshill. yes that is the strange thing, if logged in as the Marketo user in SFDC I can create or edit an Event record including the Description and All Day Event fields.
Thanks Brace, yes the profile has read and edit on the Descripton field and it is a standard field not a custom so the API name is correct. I refreshed the schema and restarted the...
Thanks Darshill, unfortunately I had already checked the FLS on the Marketo profile and it has Read and Edit access on the Description field and the All Day Event field, i refreshe...