Gmail To Outlook — GmAIl To Outlook

GmAIl to Outlook 迁移 迁移 Paths

Assess the source 环境 first:

Source Best Method Scope Google Workspace Microsoft Data 迁移 服务 Org-wide, bulk Google Takeout (MBOX) Outlook 桌面 导入 Per-user GmAIl (personal) IMAP bridge via Outlook 桌面 Per-user G Suite Legacy Microsoft 迁移 工具s Per-user or bulk Pre-迁移 检查列出

运行 through this with the 命令行工具ent before touching anything:

Inventory — Number of users, total mAIlbox sizes, largest mAIlbox, 分享d mAIlboxes, Google Groups Microsoft 365 plan — Confirm active subscription, 验证 admin 访问 (Global Admin required) Source admin 访问 — Google Workspace Super Admin + 服务 account for bulk 迁移 DNS 访问 — Whoever manages MX records (registrar, Cloudflare, etc.) Data scope — EmAIl only? +Contacts? +Calendars? +Drive files? Cutover window — When to switch MX records (weekend recommended) 命令行工具ent communication — Draft emAIl to users about the switch, new 记录in instructions Retention — Keep Google Workspace active 30 days post-迁移 as safety net Method 1: Microsoft Data 迁移 服务 (Recommended for Google Workspace)

Best for org-wide 迁移s from Google Workspace to Microsoft 365.

设置up Microsoft 365 Admin Center → 迁移 → Data 迁移 Select Google Workspace as source 创建 服务 account in Google Admin Console with domAIn-wide delegation 上传 服务 account key file to Microsoft 迁移 工具 Select what to 迁移: EmAIl, Contacts, Calendars Choose date range 过滤器 (optional — 迁移 only last N months to save time) Execution 添加 users to 迁移 (CSV 上传 for bulk: source_emAIl,destination_emAIl) 启动 迁移 — Microsoft handles delta 同步 automatically 监控 进度 in Admin Center → shows per-user 状态 迁移 运行s in background — users can keep using GmAIl during this phase CSV 格式化 source_emAIl,destination_emAIl john@company.com,john@company.onmicrosoft.com jane@company.com,jane@company.onmicrosoft.com

See references/csv-template.md for full template with notes.

Method 2: Google Takeout + Outlook 导入

Best for individual users or when bulk 迁移 fAIls.

导出 from Google Go to Google Takeout: https://takeout.google.com Select MAIl, Contacts, Calendar Choose MBOX 格式化 for mAIl (compatible with Outlook) 下载 归档 when ready (can take hours/days for large mAIlboxes) 导入 to Outlook EmAIl: Outlook 桌面 → File → Open & 导出 → 导入/导出 → 导入 from MBOX Contacts: 导入 Google CSV to Outlook contacts Calendar: 导出 Google Calendar as ICS, 导入 to 日历管理

Limitations: Manual per-user process, requires 桌面 Outlook, size limits.

Method 3: IMAP Bridge (Manual / Small 扩展)

For personal GmAIl accounts or when other methods fAIl:

Enable IMAP in GmAIl: 设置tings → Forwarding and POP/IMAP → Enable IMAP 创建 应用 password for GmAIl account In Outlook 桌面, 添加 GmAIl as IMAP account using 应用 password 设置 up Microsoft 365 account in same Outlook 性能分析 Drag-and-drop folders from GmAIl IMAP to Microsoft 365 mAIlbox Data M应用ing Considerations GmAIl Feature Outlook Equivalent Notes Labels Folders Multiple labels become copies in folders Google Groups Distribution 列出s May need manual recreation Google Drive links OneDrive links Links break — 迁移 files separately GmAIl 过滤器s Outlook rules Manual recreation required Hangouts/Chat 历史 Teams Not directly migratable DNS / MX Cutover

After 迁移 data is transferred:

验证 domAIn in Microsoft 365 Admin Center (TXT record) 更新 MX records to Microsoft: Priority Host 0 company-com.mAIl.保护ion.outlook.com

设置 SPF: v=spf1 include:spf.保护ion.outlook.com ~all 设置 DKIM: Admin Center → Defender → EmAIl authentication → Enable DKIM 设置 DMARC: v=DMARC1; p=none; rua=mAIlto:admin@domAIn.com (启动 with p=none) Autodiscover CNAME: autodiscover.outlook.com TTL: Lower TTL to 300 before cutover, 恢复 to 3600 after 48h

See references/dns-records.md for copy-paste DNS templates.

Post-迁移 验证

运行 these 检查s for every user:

EmAIl receiving on Outlook (发送 test from external) Historical emAIls present (spot-检查 oldest + newest) Folders m应用ed correctly (labels→folders) Contacts 导入ed (检查 count vs Google) Calendar 事件 present (检查 recurring 事件 specifically) Google Groups re创建d as Distribution 列出s 签名atures 设置 up in Outlook 移动 devices re-配置d (Outlook 应用 or Exchange) GmAIl IMAP disabled or account 移除d

See references/验证-检查列出.md for printable per-user 检查列出.

Common Issues Issue Fix 迁移 stuck at connecting Re-检查 Google 服务 account 权限s Labels become nested folders Expected — Google labels flatten to Outlook folders Calendar recurring 事件 broken Complex recurrences may need manual recreation Contacts missing phone numbers Google 导出s differently — 检查 导入 m应用ing Large attachments missing Items >150MB not 迁移d — 导出 separately Google