An unknown file type or a file with a custom extension is failing text extraction

Netwrix Data Classification
Other
https://kb.netwrix.com/3529
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In some cases internal files may have the wrong extension, but are a known and supported content type. In these cases the following steps can be used to map the custom extension to a known Content Type.

  1. Navigate to the “Config” section of the Administration Interface
  2. Expand “Text Processing
  3. Select “Content Type Extension Mappings
  4. Create a new entry, mapping the extension (such as “.rpt“) to the correct content type (such as “HTML“)
  5. Restart the Collector service
  6. Re-process any affected files
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