CRM Integration Migration Checklist: Global SME

1. Overview

• Risk Level: Medium (Operational disruption to sales pipelines and data synchronisation).
• Timeline: 4–6 weeks.
• Team Size: 3–5 (Project Lead, CRM Admin, IT/Security Lead, Data Analyst).

2. Phase 1: Pre-Migration Planning (Week 1–3)

Assessment & Audit

• Map all existing CRM API endpoints and webhooks.
• Identify all third-party apps connected to the current CRM (e.g., Marketing Automation, Billing, Support).
• Catalog service accounts and API keys currently in use.
• Document existing custom field mappings and data transformation logic.
• Categorise integrations by criticality (e.g., Revenue-generating vs. Reporting).
• Evaluate the new provider’s API rate limits against current transaction volumes.
• Verify compliance of the new provider with internal security policies.

Data Mapping & Preparation

• Create a comprehensive data dictionary for cross-platform field alignment.
• Identify redundant or "stale" data that should not be migrated.
• Perform a data cleansing exercise to deduplicate records in the source CRM.
• Define custom transformation rules for non-standard data types.
• Design the schema for the target CRM’s custom objects.
• Validate data formats (e.g., date formats, currency symbols) against the new system requirements.

Golden Copy Backup

• Execute a full export of all CRM records (Accounts, Contacts, Deals, Activities).
• Verify the integrity of the exported CSV/JSON files.
• Store a "Golden Copy" of the production data in an encrypted, off-site repository.
• Perform a checksum validation on the backup files.
• Document the restoration process for the Golden Copy in case of immediate rollback.

3. Phase 2: Migration Execution

Pre-Cutover

• Configure the new provider’s sandbox environment with production-like settings.
• Set up secure authentication (OAuth 2.0 or API keys) in the new system.
• Whitelist the new CRM’s IP addresses in internal firewalls.
• Configure SMTP relay settings for automated email triggers.
• Run a small-scale pilot migration with a subset of dummy records.
• Validate field mapping accuracy using the pilot dataset.
• Establish a "Read-Only" mode on the legacy CRM to prevent mid-migration data drift.

Cutover Day

• Notify all internal stakeholders of the migration window.
• Disable write access to the legacy CRM for all non-admin users.
• Initiate the final delta sync from legacy to new provider.
• Trigger automated data validation scripts to check for record count parity.
• Monitor API error logs for failures during the bulk import.
• Update DNS/CNAME records if the CRM uses custom vanity domains.
• Activate background sync processes and event listeners.

Verification

• Perform a "spot check" on 50 random records for data accuracy.
• Test the trigger of the top 5 most critical automated workflows.
• Verify that webhooks are successfully pushing data to downstream systems.
• Confirm that user permissions/roles have been correctly replicated.
• Validate that the CRM’s integration with the email client (Outlook/Gmail) is active.
• Verify the performance of the CRM’s mobile application for remote users.

4. Phase 3: Post-Migration Optimization

Stabilization

• Monitor system logs for 72 hours for recurring API 4xx/5xx errors.
• Review user feedback logs for common UI/UX friction points.
• Adjust API polling intervals to ensure optimal performance.
• Re-index search databases to ensure rapid record retrieval.
• Conduct a final session to train power users on the new interface.

Cleanup

• Decommission legacy API keys and service accounts.
• Archive the legacy CRM instance once the data retention period is met.
• Delete temporary migration staging tables and staging databases.
• Remove hard-coded references to the old CRM in internal scripts.
• Update internal documentation and SOPs.

Retrospective

• Conduct a post-mortem meeting with the migration team.
• Document lessons learned regarding data transformation issues.
• Update the disaster recovery plan based on migration challenges.
• Close the project formally and transition to Business-as-Usual (BAU) support.

5. UK GDPR Compliance Checklist

• Update the Privacy Notice to reflect the new data processor.
• Verify the new provider has a Data Processing Agreement (DPA) in place.
• Confirm the new provider’s data centre locations (UK/EEA or adequacy agreement).
• Map the "Right to Erasure" (Right to be Forgotten) workflow in the new system.
• Ensure Subject Access Request (SAR) functionality is accessible.
• Audit the new system for "Privacy by Design" features (e.g., field-level encryption).
• Document the legal basis for processing for all migrated contact records.
• Verify that marketing consent flags are correctly migrated.

6. Troubleshooting Common Issues

• API Rate Limiting: Implement exponential backoff in integration scripts.
• Character Encoding: Check for UTF-8 compatibility to prevent "mojibake" (garbled text).
• Broken Webhooks: Regenerate secret keys and re-register endpoints.
• Field Mismatch: Create custom fields in the new system to accommodate legacy data.
• Orphaned Records: Run a script to identify records lacking parent linkages.
• Sync Loops: Implement "last-modified" timestamps to prevent circular data updates.

7. Downloadable Resources List

• Migration Data Mapping Template (Excel/CSV).
• Post-Migration User Acceptance Testing (UAT) Script.
• CRM Integration Architecture Diagram Template.
• Data Protection Impact Assessment (DPIA) Template.
• Stakeholder Communication Plan (Draft).