TYPO3 Solr: How to re index a file, which is linked in tt_content element in TYPO3

Question

I have a tt_content element in TYPO3 8.7, which contains a list of links to pdf files. Page and Files are indexed with ext:solr an ext:solrfal and I can find files by searching for contents of a pdf.

Now my question: How can I achieve, that a file will be reindexed by the planner task, when the content of that file is changed respectively when it is overwritten by a file with the same file name but different content. Do I need an additional TypoScript configuration for that?

Answer 1

If the files are changed via the TYPO3 backend, then files should be detected and indexed.