diff --git a/lib/BigBlueButton/API.php b/lib/BigBlueButton/API.php
index 2176ca3..90e1f69 100644
--- a/lib/BigBlueButton/API.php
+++ b/lib/BigBlueButton/API.php
@@ -206,7 +206,7 @@ class API {
 
 		if ($presentation !== null && $presentation->isValid()) {
 			/** @psalm-suppress InvalidArgument */
-			$createMeetingParams->addPresentation($presentation->getUrl(), null, $presentation->getFilename());
+			$createMeetingParams->addPresentation($presentation->generateUrl(), null, $presentation->getFilename());
 		}
 
 		if ($room->access === Room::ACCESS_WAITING_ROOM || $room->access === Room::ACCESS_WAITING_ROOM_ALL) {
diff --git a/lib/BigBlueButton/Presentation.php b/lib/BigBlueButton/Presentation.php
index 39e629b..b473def 100644
--- a/lib/BigBlueButton/Presentation.php
+++ b/lib/BigBlueButton/Presentation.php
@@ -2,14 +2,26 @@
 
 namespace OCA\BigBlueButton\BigBlueButton;
 
+use OCP\Files\Storage\IStorage;
+
 class Presentation {
 	private $url;
 
 	private $filename;
 
-	public function __construct(string $url, string $filename) {
-		$this->url = $url;
-		$this->filename = preg_replace('/[^\x20-\x7E]+/','#', $filename);
+	private $path;
+
+	/** @var IStorage */
+	private $storage;
+
+	public function __construct(string $path, IStorage $storage) {
+		$this->storage = $storage;
+		$this->path = preg_replace('/^\//', '', $path);
+		$this->filename = preg_replace('/[^\x20-\x7E]+/','#', $path);
+	}
+
+	public function generateUrl(): string {
+		return $this->storage->getDirectDownload($this->path);
 	}
 
 	public function getUrl(): string {
@@ -21,6 +33,6 @@ class Presentation {
 	}
 
 	public function isValid(): bool {
-		return !empty($this->url) && !empty($this->filename);
+		return !empty($this->filename);
 	}
 }
diff --git a/lib/Controller/JoinController.php b/lib/Controller/JoinController.php
index 1a56a89..4e5387d 100644
--- a/lib/Controller/JoinController.php
+++ b/lib/Controller/JoinController.php
@@ -14,11 +14,13 @@ use OCP\AppFramework\Controller;
 use OCP\AppFramework\Http\RedirectResponse;
 use OCP\AppFramework\Http\TemplateResponse;
 use OCP\BackgroundJob\IJobList;
+use OCP\Files\Storage\IStorage;
 use OCP\IRequest;
 use OCP\IURLGenerator;
 use OCP\IUserSession;
 
-class JoinController extends Controller {
+class JoinController extends Controller
+{
 	/** @var string */
 	protected $token;
 
@@ -43,6 +45,9 @@ class JoinController extends Controller {
 	/** @var IJobList */
 	private $jobList;
 
+	/** @var IStorage */
+	private $storage;
+
 	public function __construct(
 		string $appName,
 		IRequest $request,
@@ -51,7 +56,8 @@ class JoinController extends Controller {
 		IUserSession $userSession,
 		API $api,
 		Permission $permission,
-		IJobList $jobList
+		IJobList $jobList,
+		IStorage $storage
 	) {
 		parent::__construct($appName, $request);
 
@@ -61,14 +67,17 @@ class JoinController extends Controller {
 		$this->api = $api;
 		$this->permission = $permission;
 		$this->jobList = $jobList;
+		$this->storage = $storage;
 	}
 
-	public function setToken(string $token): void {
+	public function setToken(string $token): void
+	{
 		$this->token = $token;
 		$this->room = null;
 	}
 
-	public function isValidToken(): bool {
+	public function isValidToken(): bool
+	{
 		$room = $this->getRoom();
 
 		return $room !== null;
@@ -81,7 +90,8 @@ class JoinController extends Controller {
 	 *
 	 * @return RedirectResponse|TemplateResponse
 	 */
-	public function index($displayname, $u = '', $filename = '', $password = '') {
+	public function index($displayname, $u = '', $filename = '', $password = '')
+	{
 		$room = $this->getRoom();
 
 		if ($room === null) {
@@ -108,7 +118,11 @@ class JoinController extends Controller {
 			}
 
 			if ($this->permission->isAdmin($room, $userId)) {
-				$presentation = new Presentation($u, $filename);
+				$presentation = new Presentation($filename, $this->storage);
+			}
+
+			if (!$room->running && $presentation === null) {
+				$presentation = new Presentation($room->presentationPath, $this->storage);
 			}
 		} elseif ($room->access === Room::ACCESS_INTERNAL || $room->access === Room::ACCESS_INTERNAL_RESTRICTED) {
 			return new RedirectResponse($this->getLoginUrl());
@@ -138,7 +152,7 @@ class JoinController extends Controller {
 
 		$this->markAsRunning($room);
 
-		\OCP\Util::addHeader('meta', ['http-equiv' => 'refresh', 'content' => '3;url='.$joinUrl]);
+		\OCP\Util::addHeader('meta', ['http-equiv' => 'refresh', 'content' => '3;url=' . $joinUrl]);
 
 		return new TemplateResponse($this->appName, 'forward', [
 			'room' => $room->name,
@@ -146,7 +160,8 @@ class JoinController extends Controller {
 		], 'guest');
 	}
 
-	private function getRoom(): ?Room {
+	private function getRoom(): ?Room
+	{
 		if ($this->room === null) {
 			$this->room = $this->service->findByUid($this->token);
 		}
@@ -154,7 +169,8 @@ class JoinController extends Controller {
 		return $this->room;
 	}
 
-	private function getLoginUrl(): string {
+	private function getLoginUrl(): string
+	{
 		return $this->urlGenerator->linkToRoute('core.login.showLoginForm', [
 			'redirect_url' => $this->urlGenerator->linkToRoute(
 				'bbb.join.index',
@@ -163,7 +179,8 @@ class JoinController extends Controller {
 		]);
 	}
 
-	private function markAsRunning(Room $room) {
+	private function markAsRunning(Room $room)
+	{
 		if (!$room->running) {
 			$this->service->updateRunning($room->getId(), true);
 		}
diff --git a/lib/Controller/RoomController.php b/lib/Controller/RoomController.php
index a5252c5..37497fc 100644
--- a/lib/Controller/RoomController.php
+++ b/lib/Controller/RoomController.php
@@ -13,7 +13,8 @@ use OCP\IGroupManager;
 use OCP\IRequest;
 use OCP\IUserManager;
 
-class RoomController extends Controller {
+class RoomController extends Controller
+{
 	/** @var RoomService */
 	private $service;
 
@@ -56,7 +57,8 @@ class RoomController extends Controller {
 	/**
 	 * @NoAdminRequired
 	 */
-	public function index(): DataResponse {
+	public function index(): DataResponse
+	{
 		$user = $this->userManager->get($this->userId);
 		$groupIds = $this->groupManager->getUserGroupIds($user);
 		$circleIds = $this->circleHelper->getCircleIds($this->userId);
@@ -119,7 +121,9 @@ class RoomController extends Controller {
 		bool $listenOnly,
 		bool $mediaCheck,
 		bool $cleanLayout,
-		bool $joinMuted
+		bool $joinMuted,
+		string $presentationUserId,
+		string $presentationPath
 	): DataResponse {
 		$room = $this->service->find($id);
 
@@ -142,15 +146,28 @@ class RoomController extends Controller {
 			return new DataResponse(['message' => 'Access type not allowed.'], Http::STATUS_BAD_REQUEST);
 		}
 
-		return $this->handleNotFound(function () use ($id, $name, $welcome, $maxParticipants, $record, $access, $everyoneIsModerator, $requireModerator, $moderatorToken, $listenOnly, $mediaCheck, $cleanLayout, $joinMuted) {
-			return $this->service->update($id, $name, $welcome, $maxParticipants, $record, $access, $everyoneIsModerator, $requireModerator, $moderatorToken, $listenOnly, $mediaCheck, $cleanLayout, $joinMuted);
+		if ($presentationUserId != '' && $presentationUserId != $room->getPresentationUserId()) {
+			return new DataResponse(['message' => 'Not allowed to change to another user.'], Http::STATUS_BAD_REQUEST);
+		}
+
+		if ($presentationUserId === '') {
+			$presentationUserId = $this->userId;
+		}
+
+		if ($presentationUserId != $this->userId && $presentationPath != $room->getPresentationPath()) {
+			return new DataResponse(['message' => 'Not allowed to choose path of another user.'], Http::STATUS_BAD_REQUEST);
+		}
+
+		return $this->handleNotFound(function () use ($id, $name, $welcome, $maxParticipants, $record, $access, $everyoneIsModerator, $requireModerator, $moderatorToken, $listenOnly, $mediaCheck, $cleanLayout, $joinMuted, $presentationUserId, $presentationPath) {
+			return $this->service->update($id, $name, $welcome, $maxParticipants, $record, $access, $everyoneIsModerator, $requireModerator, $moderatorToken, $listenOnly, $mediaCheck, $cleanLayout, $joinMuted, $presentationUserId, $presentationPath);
 		});
 	}
 
 	/**
 	 * @NoAdminRequired
 	 */
-	public function destroy(int $id): DataResponse {
+	public function destroy(int $id): DataResponse
+	{
 		$room = $this->service->find($id);
 
 		if (!$this->permission->isAdmin($room, $this->userId)) {
diff --git a/lib/Db/Room.php b/lib/Db/Room.php
index 7fb2816..b59ec1a 100644
--- a/lib/Db/Room.php
+++ b/lib/Db/Room.php
@@ -74,6 +74,8 @@ class Room extends Entity implements JsonSerializable {
 	public $cleanLayout;
 	public $joinMuted;
 	public $running;
+	public $presentationUserId;
+	public $presentationPath;
 
 	public function __construct() {
 		$this->addType('maxParticipants', 'integer');
@@ -108,6 +110,8 @@ class Room extends Entity implements JsonSerializable {
 			'cleanLayout' => boolval($this->cleanLayout),
 			'joinMuted' => boolval($this->joinMuted),
 			'running' => boolval($this->running),
+			'presentationUserId' => $this->presentationUserId,
+			'presentationPath' => $this->presentationPath,
 		];
 	}
 }
diff --git a/lib/Service/RoomService.php b/lib/Service/RoomService.php
index d8e42b6..6117f7f 100644
--- a/lib/Service/RoomService.php
+++ b/lib/Service/RoomService.php
@@ -103,6 +103,8 @@ class RoomService {
 		$room->setMediaCheck($mediaCheck);
 		$room->setCleanLayout(false);
 		$room->setJoinMuted(false);
+		$room->setPresentationUserId('');
+		$room->setPresentationPath('');
 
 		if ($access === Room::ACCESS_PASSWORD) {
 			$room->setPassword($this->humanReadableRandom(8));
@@ -133,7 +135,9 @@ class RoomService {
 		bool $listenOnly,
 		bool $mediaCheck,
 		bool $cleanLayout,
-		bool $joinMuted) {
+		bool $joinMuted,
+		string $presentationUserId,
+		string $presentationPath) {
 		try {
 			$room = $this->mapper->find($id);
 
@@ -156,6 +160,8 @@ class RoomService {
 			$room->setMediaCheck($mediaCheck);
 			$room->setCleanLayout($cleanLayout);
 			$room->setJoinMuted($joinMuted);
+			$room->setPresentationUserId($presentationUserId);
+			$room->setPresentationPath($presentationPath);
 
 			return $this->mapper->update($room);
 		} catch (Exception $e) {