diff --git a/drush.10-11.services.yml b/drush.10-11.services.yml
index 708e827..854b610 100644
--- a/drush.10-11.services.yml
+++ b/drush.10-11.services.yml
@@ -19,3 +19,15 @@ services:
     ]
     tags:
       - { name: drush.command }
+  dgi_actions.update_identifier_locations:
+    class: \Drupal\dgi_actions\Drush\Commands\UpdateIdentifierLocations
+    arguments: [
+      '@http_client',
+      '@entity_type.manager',
+      '@dgi_actions.utils',
+      '@dgi_actions.dgiutils',
+      '@islandora.utils',
+      '@logger.channel.dgi_actions'
+    ]
+    tags:
+      - { name: drush.command }
diff --git a/src/Drush/Commands/UpdateIdentifierLocations.php b/src/Drush/Commands/UpdateIdentifierLocations.php
new file mode 100644
index 0000000..81af0ad
--- /dev/null
+++ b/src/Drush/Commands/UpdateIdentifierLocations.php
@@ -0,0 +1,250 @@
+<?php
+
+namespace Drupal\dgi_actions\Drush\Commands;
+
+use Consolidation\AnnotatedCommand\CommandData;
+use Consolidation\AnnotatedCommand\CommandError;
+use Drupal\Core\DependencyInjection\DependencySerializationTrait;
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\dgi_actions\Entity\IdentifierInterface;
+use Drupal\dgi_actions\Plugin\ContextReaction\EntityMintReaction;
+use Drupal\dgi_actions\Utility\DgiUtils;
+use Drupal\dgi_actions\Utility\IdentifierUtils;
+use Drupal\islandora\IslandoraUtils;
+use Drush\Commands\DrushCommands;
+use GuzzleHttp\ClientInterface;
+use Psr\Container\ContainerInterface;
+use Psr\Log\LoggerInterface;
+
+/**
+ * Drush commands for generating identifiers for existing objects.
+ */
+class UpdateIdentifierLocations extends DrushCommands {
+
+  use DependencySerializationTrait;
+
+  /**
+   * The HTTP client to be used to make requests.
+   *
+   * @var \GuzzleHttp\ClientInterface
+   */
+  protected ClientInterface $client;
+
+  /**
+   * The Drupal entity type manager.
+   *
+   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
+   */
+  protected EntityTypeManagerInterface $entityTypeManager;
+
+  /**
+   * Identifier utils service.
+   *
+   * @var \Drupal\dgi_actions\Utility\IdentifierUtils
+   */
+  protected IdentifierUtils $identifierUtils;
+
+  /**
+   * Utilities used for executing reactions.
+   *
+   * @var \Drupal\dgi_actions\Utility\DgiUtils
+   */
+  protected DgiUtils $utils;
+
+  /**
+   * Islandora utilities.
+   *
+   * @var \Drupal\islandora\IslandoraUtils
+   */
+  protected IslandoraUtils $islandoraUtils;
+
+  /**
+   * Logger.
+   *
+   * @var \Psr\Log\LoggerInterface
+   */
+  protected LoggerInterface $ourLogger;
+
+  /**
+   * Handle Drush commands.
+   *
+   * @param \GuzzleHttp\ClientInterface $client
+   *   The HTTP client to be used to make requests.
+   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
+   *   The Drupal entity type manager.
+   * @param \Drupal\dgi_actions\Utility\IdentifierUtils $identifier_utils
+   *   The identifier utils used to retrieve a DGI Actions Identifier.
+   * @param \Drupal\dgi_actions\Utility\DgiUtils $utils
+   *   The utils used to execute identifier reactions.
+   * @param \Drupal\islandora\IslandoraUtils $islandora_utils
+   *   Islandora utils.
+   * @param \Psr\Log\LoggerInterface $logger
+   *   A logger to which to log.
+   */
+  public function __construct(ClientInterface $client, EntityTypeManagerInterface $entity_type_manager, IdentifierUtils $identifier_utils, DgiUtils $utils, IslandoraUtils $islandora_utils, LoggerInterface $logger) {
+    parent::__construct();
+    $this->client = $client;
+    $this->entityTypeManager = $entity_type_manager;
+    $this->identifierUtils = $identifier_utils;
+    $this->utils = $utils;
+    $this->islandoraUtils = $islandora_utils;
+    $this->ourLogger = $logger;
+  }
+
+  /**
+   * {@inheritDoc}
+   */
+  public static function create(ContainerInterface $container) : self {
+    return new static(
+      $container->get('http_client'),
+      $container->get('entity_type.manager'),
+      $container->get('dgi_actions.identifier_utils'),
+      $container->get('dgi_actions.utils'),
+      $container->get('islandora.utils'),
+      $container->get('logger.channel.dgi_actions')
+    );
+  }
+
+  /**
+   * Generates missing identifiers for entities.
+   *
+   * Mints missing identifiers of a configured identifier service and updates
+   * the target entity in the configured field if a missing identifier was
+   * minted.
+   *
+   * @param array $options
+   *   An array containing options passed to the generate command containing:
+   *   -identifier_id: The DGI Actions Identifier being targeted for use in the
+   *   generation process.
+   *   -ids: Comma separated list of IDs to be targeted or all entities if not
+   *   specified.
+   *
+   * @command dgi_actions:update_identifier_locations
+   *
+   * @option identifier_id
+   *   A string pointing to the DGI Actions Identifier ID to be used for the
+   *   generation.
+   * @option ids
+   *   A comma separated list of IDs to be targeted or all entities if not
+   *   specified.
+   *
+   * @aliases da:update_identifier_locations
+   *
+   * @usage dgi_actions:update_identifier_locations --identifier_id=handle
+   *   Generates missing identifiers by searching all entities for the "handle"
+   *   DGI Actions Identifier entity.
+   * @usage dgi_actions:update_identifier_locations --identifier_id=handle --ids=1,2,3
+   *   Generates missing identifiers for the entities with IDs of 1, 2, or 3 for
+   *   the "handle" DGI Actions Identifier entity.
+   */
+  public function generate(array $options = [
+    'identifier_id' => self::REQ,
+    'ids' => self::OPT,
+  ]): void {
+    $identifier = $this->entityTypeManager->getStorage('dgiactions_identifier')->load($options['identifier_id']);
+    $ids = $options['ids'];
+    $batch = [
+      'title' => dt('Generating identifiers...'),
+      'operations' => [
+        [
+          [$this, 'generateBatch'], [
+          $identifier,
+          $ids,
+        ],
+        ],
+      ],
+    ];
+    drush_op('batch_set', $batch);
+    drush_op('drush_backend_batch_process');
+  }
+
+  /**
+   * Validates the generate command.
+   *
+   * @hook validate dgi_actions:generate
+   */
+  public function updateValidate(CommandData $data) {
+    $options = $data->getArgsAndOptions();
+
+    if (empty($options['options']['identifier_id'])) {
+      return new CommandError(dt('An "identifier_id" must be specified.'));
+    }
+    $identifiers = $this->identifierUtils->getIdentifiers();
+    if (!isset($identifiers[$options['options']['identifier_id']])) {
+      return new CommandError(dt('The DGI Actions identifier entity (!id) does not exist.', ['!id' => $options['options']['identifier_id']]));
+    }
+  }
+
+  /**
+   * Batch for updating NULL field_weight values where siblings are integers.
+   *
+   * @param \Drupal\dgi_actions\Entity\IdentifierInterface $identifier
+   *   The DGI Actions Identifier ID to be used for the generation.
+   * @param string|null $ids
+   *   The IDs to go generate identifiers for or NULL if the entire repository.
+   * @param array|\DrushBatchContext $context
+   *   Batch context.
+   */
+  public function generateBatch(IdentifierInterface $identifier, ?string $ids, &$context): void {
+    $sandbox =& $context['sandbox'];
+
+    $entity_type = $identifier->get('entity');
+    $entity_id_key = $this->entityTypeManager->getDefinition($entity_type)->getKeys()['id'];
+
+    $entity_storage = $this->entityTypeManager->getStorage($entity_type);
+    $query = $entity_storage->getQuery()
+      ->accessCheck(FALSE);
+
+    $query->condition('field_handle', '', '<>');
+
+    if ($ids) {
+      $query->condition($entity_id_key, explode(',', $ids), 'IN');
+    }
+
+    if (!isset($sandbox['total'])) {
+      $count_query = clone $query;
+      $sandbox['total'] = $count_query->count()->execute();
+      if ($sandbox['total'] === 0) {
+        $context['message'] = dt('Batch empty.');
+        $context['finished'] = 1;
+        return;
+      }
+      $sandbox['last_id'] = FALSE;
+      $sandbox['completed'] = 0;
+    }
+
+    if ($sandbox['last_id']) {
+      $query->condition($entity_id_key, $sandbox['last_id'], '>');
+    }
+    $query->sort($entity_id_key);
+    $query->range(0, 10);
+
+    foreach ($query->execute() as $result) {
+      try {
+        $sandbox['last_id'] = $result;
+
+        $entity = $this->entityTypeManager->getStorage($entity_type)->load($result);
+        $this->ourLogger->debug('Attempting to generate/validate location for {entity} {entity_id}.', [
+          'entity' => $entity_type,
+          'entity_id' => $result,
+        ]);
+        if (!$entity) {
+          // $identifier = $node->get($identifier_field)->getString();
+          // $response = \Drupal::service('http_client')->request('GET', $identifier);
+          // Parse the response to get the actual location.
+          // Does the location from the response = what we expect generated with the new change?
+        }
+      }
+      catch (\Exception $e) {
+        $this->ourLogger->error(
+          'Encountered an exception: {exception}', [
+            'exception' => $e,
+          ]
+        );
+      }
+      $sandbox['completed']++;
+      $context['finished'] = $sandbox['completed'] / $sandbox['total'];
+    }
+  }
+
+}