Sign in to your website as a user with the administrator role, and then enable the module.
In the admin menu, go to Configuration > Search API attachments.
In the Extraction method list, click Solr extractor.
In the Solr server list, click Acquia Search API server (which uses Acquia Search as the back end).
Click Submit and test extraction to test.
Drupal 7
Install and enable both the Search API attachments module and its requirements.
Go to the Search API configuration page, and then click the Search API attachments tab.
Scroll to the Solr Extraction Settings section, and in the Solr extracting servlet path field, enter update/extract.
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If this content did not answer your questions, try searching or contacting our support team for further assistance.