Outlook - unwanted asian like characters

Hi @Karlo Navarro Ulate,

Thank you for bringing this and for providing the additional details.

Based on your description, this sounds very similar to a known Classic Outlook encoding issue. A common symptom is the appearance of Asian/Chinese-like garbled characters in system-generated messages such as Read Receipts, Meeting Requests, Email Recalls, and IRM-protected emails.

One documented cause is when the sender's Windows device has the following setting enabled: "Beta: Use Unicode UTF-8 for worldwide language support". Unfortunately, this setting is not fully supported by Classic Outlook and can result in unexpected character encoding behavior in certain Outlook-generated messages.

I would recommend reviewing and testing the workaround documented in the following Microsoft article: Strange characters in Outlook email text - Outlook | Microsoft Learn

If the issue persists after applying the recommended workaround, I would suggest using the Report a Problem feature directly within the Classic Outlook application. This helps ensure that the issue is captured by Microsoft with diagnostic information from the affected environment.

In addition, since multiple users within your organization appear to be affected, I recommend working with your Microsoft 365 administrator to open a support ticket with Microsoft Support. The Microsoft support and product teams have access to backend diagnostic tools, service telemetry, and tenant-specific data that are not available through the community forum, allowing them to investigate the issue more thoroughly within your environment.

Just as a brief note, this is a user-to-user support forum, so I do not have direct access to internal Microsoft systems or the Outlook product team. You can view me as a fellow community member doing my best to share information, research, and suggestions based on official documentation and similar cases reported by other users. I sincerely appreciate your understanding and your willingness to consider the information I've shared.

Thank you again for taking the time to provide these details.

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