Project Overview
Industry: Architecture & Design
Region: India
Source Platform: Microsoft 365 (Exchange Online)
Destination Platform: Google Workspace
Total Data Migrated: 40GB
Migration Timeline: 2 Days
Downtime: Less than 30 Minutes
Client Requirement
The client required a fast and secure migration to Google Workspace to improve collaboration, simplify email administration, enhance security configurations, and maintain complete mailbox integrity without disrupting daily business operations.
Migration Challenges
• Large cumulative mailbox data (40GB)
• Strict 48-hour deadline
• Risk of disruption during DNS cutover
• Requirement for complete pre-migration backup
• Preservation of folder hierarchy and metadata
Migration Strategy
Phase 1: Pre-Migration Audit & Planning
Conducted mailbox audit, analyzed folder structures, pre-created user accounts in Google Workspace, and completed domain verification in advance.
Phase 2: Secure Backup & Data Protection
Exported full 40GB mailbox backup, performed integrity validation, stored encrypted backups securely, and ensured rollback readiness.
Phase 3: Parallel Email Migration Execution
Executed parallel batch migration using Google Data Migration Service (IMAP configuration) with average throughput of 3–5GB per hour, completing full migration within ~20 hours.
Phase 4: DNS Cutover & Email Flow Testing
Reduced TTL values, updated MX records strategically, configured SPF, DKIM, and DMARC, and performed end-to-end email testing with downtime restricted to under 30 minutes.
Migration Results
• 40GB Data Migrated Successfully
• 0% Data Loss
• Completed Within 48 Hours
• Downtime Less Than 30 Minutes
• No Email Delivery Issues Post Migration
• Fully Secured Backup Availability
Business Impact
Post migration, the client experienced improved collaboration, enhanced email security, simplified administration, stable mail flow, and scalable infrastructure for future growth.
Planning to Migrate from Microsoft 365 to Google Workspace?
VM3 Tech Solutions LLP provides secure, zero-downtime email migration services tailored to your business needs. Contact us today for a free migration assessment and timeline estimation.