Currently, in the new Unified Client Interface (UCI) within Power Platform, importing files that contain special characters such as "&" results in an error stating that the file is not well-formed. This behavior differs from the previous (classic) UI, which automatically sanitized or cleaned the file during import, allowing the process to complete successfully.

This limitation has caused users migrating to UCI experience unexpected failures when importing data files that include special characters. Which then creates additional manual steps for data preparation and increases the risk of errors during migration or bulk updates.

Enhance the UCI file import process to:

• Automatically detect and sanitize special characters during import, similar to the classic UI.
• Provide clear, actionable error messages if sanitization is not possible.
• Optionally, include a pre-validation tool or toggle to clean files before upload.

This improvement will:

• Reduce friction for customers transitioning to UCI.
• Minimize manual intervention and data preparation time.
• Improve overall user experience and data integrity during imports.