Modern collaboration migration is no longer a simple mailbox move. Enterprises migrating from platforms such as Microsoft, Tencent, or Alibaba to Google Workspace must address data integrity, security, and operational continuity. Technical Architecture: How Migration Is Actually Done A professional Google Workspace migration typically follows five technical phases: 1. Assessment & Discovery Inventory of mailboxes, shared drives, calendars, and permissions Identification of data sources (Exchange, Microsoft 365, local NAS, Tencent Docs, Alibaba DingTalk, etc.) Risk assessment (large mailboxes, legacy file formats, inactive users) 2. Identity & Security Preparation Domain verification and DNS readiness User identity mapping (email aliases, groups,...