Best Practices for Salesforce Data Migration

By Intellectual Clouds Team | Last Updated: June 10, 2026

Why Data Migrations Fail

A poorly executed data migration can cripple a business. If relationships are broken (e.g., Contacts are not linked to the correct Accounts) or legacy garbage data floods the new system, users will lose trust in Salesforce immediately.

The Order of Operations

In Salesforce, records are relational. You cannot migrate a Contact if the Account it belongs to doesn't exist yet. The standard migration order is:

| Order | Object | Dependency | | :--- | :--- | :--- | | 1st | Users | Required to assign record ownership | | 2nd | Accounts | The parent object for most records | | 3rd | Contacts | Must be linked to Accounts | | 4th | Opportunities | Must be linked to Accounts & Contacts | | 5th | Activities / Tasks | Must be linked to all of the above |

Step-by-Step Process for Migration

Step 1: Cleanse the Legacy Data

Do not migrate trash. Dedicate time to deduplicate records, standardizing formats (e.g., State abbreviations), and archiving data that hasn't been touched in over 5 years.

Step 2: Data Mapping

Create a comprehensive spreadsheet mapping every field from the legacy system to its corresponding field in Salesforce. Ensure data types match (you cannot push text into a Date field).

Step 3: Create External IDs

Create a custom text field in Salesforce marked as "External ID." Map the primary key/ID from your old system into this field. This is critical for matching related records (like Contacts to Accounts) using the Salesforce Data Loader.

Step 4: The Sandbox Test

Never perform a migration directly in Production. Run a test migration with 10% of your data in a Full or Partial Copy Sandbox to identify mapping errors.

Step 5: Production Run & Validation

Turn off automation rules (Validation Rules, Triggers, Flows) before running the final migration to prevent massive email blasts or CPU timeouts. Turn them back on after data is validated.

Real Example

During a recent Salesforce Consultancy engagement, a client migrating from HubSpot had thousands of duplicate contacts. Instead of doing it manually, we utilized Business Process Automation scripts to merge duplicates based on email domains before generating the final CSVs for the Salesforce Data Loader, resulting in a pristine 100% successful upload rate.

Frequently Asked Questions

1. Which tool should I use for migration?

For small sets (under 50k records), the native Data Import Wizard is fine. For massive, complex migrations, use the Salesforce Data Loader or third-party ETL tools like Jitterbit or Talend.

2. Should I migrate attachments and files?

Files take up significant storage space, which is expensive in Salesforce. We recommend migrating only active files and keeping historical files in a cheaper storage solution like SharePoint or AWS.

3. How do I migrate historical created dates?

By default, Salesforce sets the "Created Date" to the day of the migration. To retain historical dates, you must enable the specific permission "Create Audit Fields" before the migration.

4. How long does a migration take?

Depending on data volume and cleanliness, a migration project can take anywhere from 2 weeks for a simple org to 3 months for a massive enterprise transition.

5. Can you manage our data migration?

Yes. Our implementation team handles end-to-end data cleansing, mapping, and loading to ensure zero downtime for your business.