MIP on-premise scanner completed and showing lot of errors

Hello ANAND_SUNKA,

Here is some reasoning to the error messages that might be helpful in your case,

"Protecting empty Office files is not supported, BadInputErro - This could be because the file does not have any content, like a 0KB file. 
"OpenFile failed, message: 'XMPFiles: No smart file handler available to handle file' - Since this XMP could be metadata files, it's possible the scanner excludes this to prevent from changing files that are critical.
"Failed to get metadata, Invalid MS property stream header, - This could be possible if the file is corrupted or has unrecognized header or it is part of a compound files by apps, preventing AIP scanner to read it.
"Failed to open/create root storage, not a valid compound file, Problems reading directory - Compound files are structured storage files that contain multiple streams and storages within a single file, often used by applications to store complex data. Could be possible this is corrupted or not able to access because of the file types/permissions.
"The file has been protected using non RMS technologies - Not sure if there are any other solutions in place that is preventing the scanner from accessing the file.
 

The best place to troubleshoot is from the logs to look at the files being scanned and more details if any. You can also try enabling debug logging: 

Running the Microsoft Purview Information Protection scanner | Microsoft Learn

Logs are located under: %localappdata%\Microsoft\MSIP\Logs 

Also, refer to the below for general troubleshooting guidelines,

Issues with Microsoft Purview Information Protection scanner - Microsoft 365 | Microsoft Learn

Hope this helps! If it doesn't, get in touch with support to troubleshoot this further - Contact Us - Microsoft Support

Regards,

Prathista

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