Mapping Salesforce Fields and Custom Object

From the left-hand sidebar, navigate to Tools → Integrations

In the Salesforce tile, select Connect
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Choose the fields to Read from Salesforce

Select Next Step to continue.
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Click the Enable Salesforce capabilities toggle

Click Install Package

Check the I’ve installed the package checkbox
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Click Save Mapping Configuration to save your changes
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In Salesforce, navigate to Custom Objects
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From Objects, select Opportunity
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Opportunity Lightning Page
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Add https://*.joinzealot.com to Security → Trusted URLs
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