[9034725985]

Thank you. That gives me a red underline under ContactId and Email now. I think because input.Contact__c and input.ContactEmail__c are unknown. I think this is the right direction. What is my next step?

    const myOutput: Output = {
        ContactId: input.Contact__c,
        Email: input.ContactEmail__c,
        IsInternalUpdate: true,
        Preferences: mypreferences
    }

(property) Output.ContactId: string Type 'unknown' is not assignable to type 'string'.ts(2322) Output.ts(4, 5): The expected type comes from property 'ContactId' which is declared here on type 'Output'