Technical Walkthrough: How to Migrate to Microsoft 365 with Zero Downtime
Migrating to Microsoft 365 is not just about moving data. It is about keeping users connected, systems stable, and business operations uninterrupted. Downtime during migration can cost productivity and cause confusion. This walkthrough details how to technically plan and execute a zero-downtime Microsoft 365 migration with precision. Step 1: Pre-Migration Assessment Before anything moves, evaluate the existing environment. Identify the number of mailboxes, their sizes, and the critical data types involved. Review retention policies, active directory structures, and user provisioning. This is also the stage to validate bandwidth capacity and endpoint readiness. Take note of custom domains, DNS configurations, and security settings. A clear audit sets the foundation for seamless execution. Step 2: Secure Authentication and Permissions Use Modern Authentication protocols. Enable OAuth 2.0 to securely establish connections to both source and destination. Assign roles and perm...