I am trying to use Zapier to integrate Volunteerhub and Salesforce, and I am stuck on the last step of my process. When someone volunteers, I want the type of work they do (think Admin, Field Trip, etc) to add to a multi-select list on their Contact page. The issue I am running into is I need to be able to add the value from the new volunteer event to the existing values already in Salesforce, and I cannot figure out how to get and modify the existing value, only how to overwrite it.
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