Critical Fix: Outlook Copy Function Freeze Issue in Microsoft 365

Overview

A significant issue has been identified in Classic Outlook where the application freezes or hangs when users attempt to copy text using the Ctrl+C shortcut. This problem primarily affects users of Current Channel Version 2409 (Build 18025.20096) or higher, particularly when using languages that require an Input Method Editor (IME).

Issue Details

When users attempt to select and copy text from an email in Classic Outlook using the standard Ctrl+C shortcut, the application becomes unresponsive. This issue is specifically observed under the following conditions:

- Users running Current Channel Version 2409 (Build 18025.20096) or higher

- Systems utilizing languages with IME (Input Method Editor)

Resolution Status

Microsoft has developed and implemented a fix for this issue. The fix is being rolled out across different channels according to the following schedule:

Release Schedule

- **Beta Channel**: Released

 - Version 2501 (Build 18410.15040)

- **Current Channel Preview**: Available

 - Version 2510 (Build 18429.20000)

- **Current Channel**: Pending Release

 - Version 2501 (Build 18429.20000)

 - Expected release date: January 27, 2025

- **Monthly Enterprise Channel**: Scheduled

 - Version 2501 (Build 18429.20000)

 - Expected release date: March 11, 2025

Temporary Workarounds

Until the fix becomes available in your channel, you can implement one of these temporary solutions:

Option 1: Revert to Previous IME Version

Configure Windows to use a previous version of the Input Method Editor. For detailed instructions, consult Microsoft's documentation on reverting to a previous IME version.

Option 2: Rollback Outlook Version

Revert Outlook to a build prior to Version 2409 using the following steps:

1. Launch Command Prompt with Administrator privileges

2. Execute the following commands in sequence from the CMD line:

cd %programfiles%\Common Files\Microsoft Shared\ClickToRun
officec2rclient.exe /update user updatetoversion=16.0.17928.20156

Verification

After implementing either workaround or receiving the update, users should verify that the copy function works correctly by:

1. Opening a Classic Outlook email

2. Selecting text within the email

3. Using Ctrl+C to copy the selected text

4. Confirming that Outlook remains responsive

Additional Information

For users requiring more details about IME functionality or update history, Microsoft provides comprehensive documentation on:

- Input Method Editors (IME) implementation and configuration

- Microsoft 365 Apps update history and version control

Note

This issue specifically affects Classic Outlook within Microsoft 365. Users experiencing similar issues should verify their current build version and channel to determine if they are affected by this known issue.