diff --git a/apps/files/appinfo/info.xml b/apps/files/appinfo/info.xml
index f9ea4b40e90..84535aa6240 100644
--- a/apps/files/appinfo/info.xml
+++ b/apps/files/appinfo/info.xml
@@ -53,6 +53,7 @@
 		<command>OCA\Files\Command\Object\Info</command>
 		<command>OCA\Files\Command\Object\ListObject</command>
 		<command>OCA\Files\Command\Object\Orphans</command>
+		<command>OCA\Files\Command\Object\Multi\Users</command>
 		<command>OCA\Files\Command\WindowsCompatibleFilenames</command>
 	</commands>
 
diff --git a/apps/files/composer/composer/autoload_classmap.php b/apps/files/composer/composer/autoload_classmap.php
index 4cc52e54761..d7b2f20a0f5 100644
--- a/apps/files/composer/composer/autoload_classmap.php
+++ b/apps/files/composer/composer/autoload_classmap.php
@@ -36,6 +36,7 @@ return array(
     'OCA\\Files\\Command\\Object\\Get' => $baseDir . '/../lib/Command/Object/Get.php',
     'OCA\\Files\\Command\\Object\\Info' => $baseDir . '/../lib/Command/Object/Info.php',
     'OCA\\Files\\Command\\Object\\ListObject' => $baseDir . '/../lib/Command/Object/ListObject.php',
+    'OCA\\Files\\Command\\Object\\Multi\\Users' => $baseDir . '/../lib/Command/Object/Multi/Users.php',
     'OCA\\Files\\Command\\Object\\ObjectUtil' => $baseDir . '/../lib/Command/Object/ObjectUtil.php',
     'OCA\\Files\\Command\\Object\\Orphans' => $baseDir . '/../lib/Command/Object/Orphans.php',
     'OCA\\Files\\Command\\Object\\Put' => $baseDir . '/../lib/Command/Object/Put.php',
diff --git a/apps/files/composer/composer/autoload_static.php b/apps/files/composer/composer/autoload_static.php
index 221155c8e51..f5ebd93e196 100644
--- a/apps/files/composer/composer/autoload_static.php
+++ b/apps/files/composer/composer/autoload_static.php
@@ -51,6 +51,7 @@ class ComposerStaticInitFiles
         'OCA\\Files\\Command\\Object\\Get' => __DIR__ . '/..' . '/../lib/Command/Object/Get.php',
         'OCA\\Files\\Command\\Object\\Info' => __DIR__ . '/..' . '/../lib/Command/Object/Info.php',
         'OCA\\Files\\Command\\Object\\ListObject' => __DIR__ . '/..' . '/../lib/Command/Object/ListObject.php',
+        'OCA\\Files\\Command\\Object\\Multi\\Users' => __DIR__ . '/..' . '/../lib/Command/Object/Multi/Users.php',
         'OCA\\Files\\Command\\Object\\ObjectUtil' => __DIR__ . '/..' . '/../lib/Command/Object/ObjectUtil.php',
         'OCA\\Files\\Command\\Object\\Orphans' => __DIR__ . '/..' . '/../lib/Command/Object/Orphans.php',
         'OCA\\Files\\Command\\Object\\Put' => __DIR__ . '/..' . '/../lib/Command/Object/Put.php',
diff --git a/apps/files/lib/Command/Object/Multi/Users.php b/apps/files/lib/Command/Object/Multi/Users.php
new file mode 100644
index 00000000000..e8f7d012641
--- /dev/null
+++ b/apps/files/lib/Command/Object/Multi/Users.php
@@ -0,0 +1,98 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * SPDX-FileCopyrightText: 2025 Robin Appelman <robin@icewind.nl>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\Files\Command\Object\Multi;
+
+use OC\Core\Command\Base;
+use OC\Files\ObjectStore\PrimaryObjectStoreConfig;
+use OCP\IConfig;
+use OCP\IUser;
+use OCP\IUserManager;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class Users extends Base {
+	public function __construct(
+		private readonly IUserManager $userManager,
+		private readonly PrimaryObjectStoreConfig $objectStoreConfig,
+		private readonly IConfig $config,
+	) {
+		parent::__construct();
+	}
+
+	protected function configure(): void {
+		parent::configure();
+		$this
+			->setName('files:object:multi:users')
+			->setDescription('Get the mapping between users and object store buckets')
+			->addOption('bucket', 'b', InputOption::VALUE_REQUIRED, 'Only list users using the specified bucket')
+			->addOption('object-store', 'o', InputOption::VALUE_REQUIRED, 'Only list users using the specified object store configuration')
+			->addOption('user', 'u', InputOption::VALUE_REQUIRED, 'Only show the mapping for the specified user, ignores all other options');
+	}
+
+	public function execute(InputInterface $input, OutputInterface $output): int {
+		if ($userId = $input->getOption('user')) {
+			$user = $this->userManager->get($userId);
+			if (!$user) {
+				$output->writeln("<error>User $userId not found</error>");
+				return 1;
+			}
+			$users = new \ArrayIterator([$user]);
+		} else {
+			$bucket = (string)$input->getOption('bucket');
+			$objectStore = (string)$input->getOption('object-store');
+			if ($bucket !== '' && $objectStore === '') {
+				$users = $this->getUsers($this->config->getUsersForUserValue('homeobjectstore', 'bucket', $bucket));
+			} elseif ($bucket === '' && $objectStore !== '') {
+				$users = $this->getUsers($this->config->getUsersForUserValue('homeobjectstore', 'objectstore', $objectStore));
+			} elseif ($bucket) {
+				$users = $this->getUsers(array_intersect(
+					$this->config->getUsersForUserValue('homeobjectstore', 'bucket', $bucket),
+					$this->config->getUsersForUserValue('homeobjectstore', 'objectstore', $objectStore)
+				));
+			} else {
+				$users = $this->userManager->getSeenUsers();
+			}
+		}
+
+		$this->writeStreamingTableInOutputFormat($input, $output, $this->infoForUsers($users), 100);
+		return 0;
+	}
+
+	/**
+	 * @param string[] $userIds
+	 * @return \Iterator<IUser>
+	 */
+	private function getUsers(array $userIds): \Iterator {
+		foreach ($userIds as $userId) {
+			$user = $this->userManager->get($userId);
+			if ($user) {
+				yield $user;
+			}
+		}
+	}
+
+	/**
+	 * @param \Iterator<IUser> $users
+	 * @return \Iterator<array>
+	 */
+	private function infoForUsers(\Iterator $users): \Iterator {
+		foreach ($users as $user) {
+			yield $this->infoForUser($user);
+		}
+	}
+
+	private function infoForUser(IUser $user): array {
+		return [
+			'user' => $user->getUID(),
+			'object-store' => $this->objectStoreConfig->getObjectStoreForUser($user),
+			'bucket' => $this->objectStoreConfig->getSetBucketForUser($user) ?? 'unset',
+		];
+	}
+}
diff --git a/lib/private/Files/ObjectStore/PrimaryObjectStoreConfig.php b/lib/private/Files/ObjectStore/PrimaryObjectStoreConfig.php
index fc742614e97..a10e29a9bbb 100644
--- a/lib/private/Files/ObjectStore/PrimaryObjectStoreConfig.php
+++ b/lib/private/Files/ObjectStore/PrimaryObjectStoreConfig.php
@@ -61,13 +61,12 @@ class PrimaryObjectStoreConfig {
 			return null;
 		}
 
-		$store = $this->config->getUserValue($user->getUID(), 'homeobjectstore', 'objectstore', null);
+		$store = $this->getObjectStoreForUser($user);
 
-		if ($store) {
-			$config = $configs[$store];
-		} else {
-			$config = $configs['default'];
+		if (!isset($configs[$store])) {
+			throw new \Exception("Object store configuration for '{$store}' not found");
 		}
+		$config = $configs[$store];
 
 		if ($config['arguments']['multibucket']) {
 			$config['arguments']['bucket'] = $this->getBucketForUser($user, $config);
@@ -141,8 +140,8 @@ class PrimaryObjectStoreConfig {
 		];
 	}
 
-	private function getBucketForUser(IUser $user, array $config): string {
-		$bucket = $this->config->getUserValue($user->getUID(), 'homeobjectstore', 'bucket', null);
+	public function getBucketForUser(IUser $user, array $config): string {
+		$bucket = $this->getSetBucketForUser($user);
 
 		if ($bucket === null) {
 			/*
@@ -161,4 +160,12 @@ class PrimaryObjectStoreConfig {
 
 		return $bucket;
 	}
+
+	public function getSetBucketForUser(IUser $user): ?string {
+		return $this->config->getUserValue($user->getUID(), 'homeobjectstore', 'bucket', null);
+	}
+
+	public function getObjectStoreForUser(IUser $user): string {
+		return $this->config->getUserValue($user->getUID(), 'homeobjectstore', 'objectstore', 'default');
+	}
 }