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Fix Trello → Salesforce Sync Issues (Not Working, Errors, Duplicates)

🔧 5 Common Issues

Diagnose and resolve common sync problems. We've documented the 5 most common issues, their root causes, and exactly how to fix them. See step-by-step fixes for duplicates, missing fields, rate limit errors, and connection issues.

high Very High Frequency

Salesforce Opportunity tasks don't sync to Trello cards

Also searched as: "Trello Salesforce salesforce opportunity tasks don't sync to trello cards"

#1 API Permission Issues 85% likely

📋 How to Diagnose

  1. 1. Check Salesforce API user permissions for Trello integration
  2. 2. Verify Trello API key and token validity
  3. 3. Review integration logs for authentication errors

✓ Solution

Re-authenticate Trello integration using a Salesforce API user with appropriate permissions. Generate new API credentials if needed.

⏱️ Est. time: 15 min

View Setup Guide
high Medium Frequency

Trello cards are automatically converted to Salesforce Opportunities without sales manager approval, leading to poor forecast accuracy

Also searched as: "Trello Salesforce trello cards are automatically converted to salesforce opportunities without sales manager approval, leading to poor forecast accuracy"

#1 Direct Conversion Without Review 100% likely

📋 How to Diagnose

  1. 1. Current integration converts Trello cards to Opportunities immediately
  2. 2. No validation step to ensure deal is qualified and properly structured

✓ Solution

Use Relay.app to add a sales manager approval step: When Trello card is moved to 'Qualified' list → Sales manager gets Slack notification to approve → Only create Salesforce Opportunity if approved.

⏱️ Est. time: 30 min

Use A2X → ->
View Setup Guide
medium High Frequency

Trello card moved to 'Done' list doesn't update Salesforce Opportunity stage

Also searched as: "Trello Salesforce trello card moved to 'done' list doesn't update salesforce opportunity stage"

#1 List to Stage Mapping Error 90% likely

📋 How to Diagnose

  1. 1. Check Trello list to Salesforce stage mapping
  2. 2. Test with a new card movement to see if sync works
  3. 3. Review integration configuration settings

✓ Solution

Update list-stage mapping: Map Trello 'Done' list to Salesforce 'Closed Won' stage. Use integration settings to verify and test the mapping.

⏱️ Est. time: 10 min

View Setup Guide
medium High Frequency

Trello card due date doesn't match Salesforce task due date

Also searched as: "Trello Salesforce trello card due date doesn't match salesforce task due date"

#1 Timezone Configuration Mismatch 75% likely

📋 How to Diagnose

  1. 1. Check Trello and Salesforce timezone settings
  2. 2. Review due date values in both platforms
  3. 3. Test with a new due date assignment

✓ Solution

Ensure both Trello and Salesforce are configured to use the same timezone. Update integration settings to handle timezone conversion correctly.

⏱️ Est. time: 15 min

View Setup Guide
medium Moderate Frequency

Trello card attachments don't appear in Salesforce Opportunity

Also searched as: "Trello Salesforce trello card attachments don't appear in salesforce opportunity"

#1 Attachment Sync Disabled 80% likely

📋 How to Diagnose

  1. 1. Check integration settings for attachment sync configuration
  2. 2. Review Trello API documentation for attachment permissions
  3. 3. Test with a new attachment upload

✓ Solution

Enable attachment sync in integration settings. Ensure Trello API key has access to read card attachments.

⏱️ Est. time: 20 min

View Setup Guide

Ready to automate? We have a template for you.

Copy this Trello → Salesforce blueprint, open Make.com, paste it into the canvas, and your workflow is ready to configure.

Make.com
trello-salesforce-blueprint.json 
{
  "name": "Trello → Salesforce Sync",
  "flow": [
    {
      "id": 1,
      "module": "webhooks:CustomWebhook",
      "version": 1,
      "parameters": {
        "hook": "{{YOUR_WEBHOOK_URL}}"
      },
      "mapper": {},
      "metadata": {
        "designer": {
          "x": 0,
          "y": 0
        },
        "restore": {},
        "expect": [
          {
            "name": "body",
            "type": "text",
            "label": "Body"
          }
        ]
      }
    },
    {
      "id": 2,
      "module": "salesforce:CreateRecord",
      "version": 1,
      "parameters": {},
      "mapper": {},
      "metadata": {
        "designer": {
          "x": 300,
          "y": 0
        }
      }
    }
  ],
  "metadata": {
    "instant": false,
    "version": 1,
    "scenario": {
      "roundtrips": 1,
      "maxErrors": 3,
      "autoCommit": true,
      "sequential": false
    }
  }
}

You'll need to fill in these values:

{{YOUR_WEBHOOK_URL}}

Make.com will prompt you to connect your accounts when you import this blueprint.

Download .json
Open Make.com ->

Step 1: Try the Official Integration

Direct connection

Start with the native integration if available. It's usually the most reliable, but may have limitations.

View Setup Guide

Free with your subscription

Step 2: Use Make for Custom Flows

No code automation

Create custom integration workflows with Make's visual designer. It works with almost any API.

Try Make Free ->

1000 ops/mo free. No credit card.

Step 3: Self-Hosted with n8n

Full data control

Need complete data privacy? n8n is open-source and self-hostable. Build custom integrations with full control over your data.

Try n8n Free ->

Open source. Self-host or cloud. Unlimited ops.

Step 4: Add Human Review

Approval automation

Relay adds human-in-the-loop approvals, Slack/Teams alerts, and conditional logic to your automation.

Try Relay Free ->

1000 actions/mo free. No credit card.