Find all BP Docs that have perrmissive read settings ("anyone") and change them to "loggedin" or "group-members".

elevate-bp-docs-access-setttings.php

<?php
// Ignore folder association temporarily.
remove_filter( 'bp_docs_tax_query', 'bp_docs_folder_tax_query', 10, 2 );

$doc_args = array(
    // 'folder' => ,
    'posts_per_page' => 50,
    'paged' => 1, // increment this to work through the docs.
);
if ( bp_docs_has_docs( $doc_args ) ) :
    ?>
    <ul>
    <?php while ( bp_docs_has_docs() ) : bp_docs_the_doc(); ?>
        <li>
            <?php get_the_title() ? the_title() : the_ID(); ?>
            <br/>
            <?php
            ?>
            Settings:
            <?php
            $doc_id = get_the_ID();
            $is_group_associated = false;
            if ( function_exists( 'bp_docs_get_associated_group_id' ) && bp_docs_get_associated_group_id( $doc_id ) ) {
                $is_group_associated = true;
            }
            $min_setting = ( $is_group_associated ) ? "group-members" : "loggedin";
            $settings = bp_docs_get_doc_settings( $doc_id );
            $must_update = false;
            foreach ( $settings as $cap => $value ) {
                if ( 'anyone' === $value ) {
                    $settings[ $cap ] = $min_setting;
                    $must_update = true;
                }
            }
            if ( $must_update ) {
                echo "updating doc: " . $doc_id;
                $author_id = get_the_author_meta( 'ID' );
                bp_docs_save_doc_access_settings( $doc_id, $author_id, $settings );
            } else {
                echo "NOT updating doc: " . $doc_id;
            }

            ?>

        </li>
    <?php endwhile; ?>
    </ul>
<?php
endif;
add_filter( 'bp_docs_tax_query', 'bp_docs_folder_tax_query', 10, 2 );
?>