Below is a bilingual (English and Chinese) step-by-step guide template for users (English version of Windows + English version of Outlook Classic). The format is designed with English instructions followed by Chinese explanations, making it easy for users to follow along and perform the steps directly.

下面是一份面向用户（英文版 Windows + Outlook Classic）的中英文双语操作指引模板。格式设计为英文说明 + 中文解释，方便用户直接跟着点击操作。

Clean Up Outlook Conversations to Free Up Mailbox Space

使用 Outlook Conversation Clean Up 功能清理邮箱空间

What is Conversation Clean Up?

什么是 Conversation Clean Up？

Conversation Clean Up removes redundant emails in a conversation thread. If a newer email already contains all previous messages, Outlook can safely remove the older duplicate emails and move them to the Deleted Items folder.

Conversation Clean Up 会删除邮件会话（邮件线程）中的重复邮件。如果较新的邮件已经包含了之前邮件的全部内容，Outlook 可以自动识别并删除这些重复邮件，从而释放邮箱空间。这些邮件会被移动到"Deleted Items（已删除邮件）"文件夹。

Step 1: Open Outlook Classic

步骤 1：打开 Outlook Classic

Launch Microsoft Outlook Classic on your computer.

在电脑上打开 Microsoft Outlook Classic。

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Step 2: Go to the Inbox Folder

步骤 2：进入收件箱

In the left navigation pane, click "Inbox".

在左侧导航栏中，点击"Inbox（收件箱）"。

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Step 3: Select the Folder You Want to Clean

步骤 3：选择需要清理的文件夹

Click the mail folder you want to clean, such as Inbox, Sent Items, or another folder.

选择需要清理的邮件文件夹，例如：Inbox（收件箱）、Sent Items（已发送邮件）或其他邮件文件夹。

Step 4: Open the Clean Up Menu

步骤 4：打开 Clean Up 菜单

At the top ribbon, click the "Home" tab.

在顶部功能区（Ribbon）中，点击 "Home（开始）" 选项卡。

Look for the "Delete" section and click "Clean Up".

在 "Delete（删除）" 功能组中，找到并点击 "Clean Up（清理）"。

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Step 5: Choose a Clean Up Option

步骤 5：选择清理方式

After clicking Clean Up, you will see three options:

点击Clean Up后，会看到以下三个选项：

Option 1: Clean Up Conversation

选项 1：Clean Up Conversation（清理当前会话）

Cleans duplicate messages in the selected conversation only.

仅清理当前选中的邮件会话中的重复邮件。

Option 2: Clean Up Folder

选项 2：Clean Up Folder（清理当前文件夹）

Cleans duplicate messages in the current folder.

清理当前文件夹中的重复邮件。

Option 3: Clean Up Folder & Subfolders

选项 3：Clean Up Folder & Subfolders（清理当前文件夹及其子文件夹）

Cleans duplicate messages in the selected folder and all its subfolders.

清理当前文件夹及所有子文件夹中的重复邮件。

✅ Recommended for freeing up the most mailbox space.

✅ 建议使用此选项，以获得最大的邮箱空间释放效果。

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Step 6: Confirm the Clean Up

步骤 6：确认清理

Outlook may display a confirmation message. Click "Clean Up Folder" to continue.

Outlook 可能会弹出确认窗口,点击 "Clean Up Folder"继续。

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As shown in the image below, select [Settings]—[Mail] to change the default save location for Clean Up files.

如下图选择[Settings]—[Mail]可以修改Clean Up默认文件保存的位置

Step 7: Wait for the Process to Complete

步骤 7：等待清理完成

Outlook will process the folder and move redundant messages to the "Deleted Items" folder.

Outlook 将开始分析邮件，并把识别出的重复邮件移动到 "Deleted Items（已删除邮件）" 文件夹。

⏳ The processing time depends on the number of emails in the folder.

⏳ 处理时间取决于文件夹中的邮件数量。

Step 8: Review the Deleted Items Folder

步骤 8：检查已删除邮件文件夹

Click the "Deleted Items" folder and review the messages moved there.

点击 "Deleted Items（已删除邮件）" 文件夹，检查被移动进去的邮件。

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Step 9: Permanently Delete the Removed Messages

步骤 9：永久删除邮件以释放空间

If everything looks correct, right-click "Deleted Items" and select "Empty Folder".

确认没有需要保留的邮件后，右键点击 "Deleted Items（已删除邮件）"，选择 "Empty Folder（清空文件夹）"。

⚠️ After emptying the folder, the deleted emails cannot be easily recovered.

⚠️ 清空后，邮件将难以恢复，请谨慎操作。

📷 Insert Screenshot 8 Here（插入截图8：Empty Folder）

Optional: Adjust Clean Up Settings

可选：调整 Clean Up 设置

Click:File → Options → Mail → Conversation Clean Up

点击：File → Options → Mail → Conversation Clean Up

Here you can configure:

这里可以设置：

· Where cleaned messages are stored

· 清理邮件存放的位置

· Whether flagged messages are protected

· 是否保留已标记邮件

· Whether categorized messages are protected

· 是否保留已分类邮件

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Expected Result

预期结果

✅ Mailbox size reduced

✅ 邮箱占用空间减少

✅ Fewer duplicate emails

✅ 重复邮件数量减少

✅ Easier mailbox management

✅ 邮箱管理更加方便

Notes

注意事项

Conversation Clean Up only removes redundant copies inside email conversations. It does not delete unique emails or attachments that exist only in one message.

Conversation Clean Up 仅删除会话中的重复副本，不会删除仅存在于某一封邮件中的独立内容或附件。

For the best mailbox cleanup result, combine this feature with deleting large emails and emptying the Deleted Items folder.

为了获得最佳清理效果，建议同时删除大附件邮件，并定期清空 Deleted Items 文件夹。