We have an integration that uses the CRM AP to Insert/Update several contact attributes including First name, Last name and Phone number. I want to prevent the Phone number attribute from being overwritten unless it is empty/blank. I know you can prevent overwriting at attribute using the Import functionality but I’m not seeing anything in the API that allows you to control this. I did see one suggestion to create a new customer field (e.g. Imported phone number for example) that is updated by the API call and then leverage a Workflow to determine if the Imported phone number should be used to update the Phone number field for the contact.
Thanks in advance.
Jvo
Looking at the documentation, you are not missing an option — “Provided property values will be overwritten” —