diff --git a/lib/Service/ConfigService.php b/lib/Service/ConfigService.php
index 4aa0ea09f..59cc3668f 100644
--- a/lib/Service/ConfigService.php
+++ b/lib/Service/ConfigService.php
@@ -53,6 +53,7 @@ class ConfigService {
 	use TArrayTools;
 
 
+	public const FRONTAL_CLOUD_BASE = 'frontal_cloud_base';
 	public const FRONTAL_CLOUD_ID = 'frontal_cloud_id';
 	public const FRONTAL_CLOUD_SCHEME = 'frontal_cloud_scheme';
 	public const INTERNAL_CLOUD_ID = 'internal_cloud_id';
@@ -115,6 +116,7 @@ class ConfigService {
 
 
 	private $defaults = [
+		self::FRONTAL_CLOUD_BASE => '',
 		self::FRONTAL_CLOUD_ID => '',
 		self::FRONTAL_CLOUD_SCHEME => 'https',
 		self::INTERNAL_CLOUD_ID => '',
diff --git a/lib/Service/InterfaceService.php b/lib/Service/InterfaceService.php
index 1cdab371e..6df08b960 100644
--- a/lib/Service/InterfaceService.php
+++ b/lib/Service/InterfaceService.php
@@ -31,8 +31,10 @@
 
 namespace OCA\Circles\Service;
 
+use ArtificialOwl\MySmallPhpTools\Traits\Nextcloud\nc22\TNC22Logger;
 use ArtificialOwl\MySmallPhpTools\Traits\TArrayTools;
 use ArtificialOwl\MySmallPhpTools\Traits\TStringTools;
+use OCA\Circles\AppInfo\Application;
 use OCA\Circles\Db\RemoteRequest;
 use OCA\Circles\Exceptions\RemoteNotFoundException;
 use OCA\Circles\Exceptions\UnknownInterfaceException;
@@ -67,6 +69,7 @@ class InterfaceService {
 
 	use TStringTools;
 	use TArrayTools;
+	use TNC22Logger;
 
 
 	/** @var IURLGenerator */
@@ -101,6 +104,8 @@ public function __construct(
 		$this->urlGenerator = $urlGenerator;
 		$this->remoteRequest = $remoteRequest;
 		$this->configService = $configService;
+
+		$this->setup('app', Application::APP_ID);
 	}
 
 
@@ -224,6 +229,50 @@ public function setCurrentInterfaceFromInstance(string $instance): void {
 	}
 
 
+	/**
+	 * @param int $interface
+	 *
+	 * @return bool
+	 */
+	public function isInterfaceConfigured(int $interface): bool {
+		try {
+			$config = $this->getCloudIdConfigKey($interface);
+		} catch (UnknownInterfaceException $e) {
+			return false;
+		}
+
+		return ($this->configService->getAppValue($config) !== '');
+	}
+
+
+	/**
+	 * @param int $interface
+	 *
+	 * @return string
+	 * @throws UnknownInterfaceException
+	 */
+	private function getCloudIdConfigKey(int $interface): string {
+		switch ($interface) {
+			case self::IFACE_INTERNAL:
+				return ConfigService::INTERNAL_CLOUD_ID;
+			case self::IFACE_FRONTAL:
+				return ConfigService::FRONTAL_CLOUD_ID;
+			case self::IFACE0:
+				return ConfigService::IFACE0_CLOUD_ID;
+			case self::IFACE1:
+				return ConfigService::IFACE1_CLOUD_ID;
+			case self::IFACE2:
+				return ConfigService::IFACE2_CLOUD_ID;
+			case self::IFACE3:
+				return ConfigService::IFACE3_CLOUD_ID;
+			case self::IFACE4:
+				return ConfigService::IFACE4_CLOUD_ID;
+		}
+
+		throw new UnknownInterfaceException('unknown interface');
+	}
+
+
 	/**
 	 * @param bool $useString
 	 *
@@ -288,8 +337,12 @@ public function getInternalInterfaces(bool $useString = false): array {
 	 *
 	 * @throws UnknownInterfaceException
 	 */
-	public function getCloudInstance(): string {
-		switch ($this->getCurrentInterface()) {
+	public function getCloudInstance(int $interface = 0): string {
+		if ($interface === 0) {
+			$interface = $this->getCurrentInterface();
+		}
+
+		switch ($interface) {
 			case self::IFACE_INTERNAL:
 				return $this->configService->getInternalInstance();
 			case self::IFACE_FRONTAL:
@@ -299,7 +352,7 @@ public function getCloudInstance(): string {
 			case self::IFACE2:
 			case self::IFACE3:
 			case self::IFACE4:
-				return $this->configService->getIfaceInstance($this->getCurrentInterface());
+				return $this->configService->getIfaceInstance($interface);
 			case self::IFACE_TEST:
 				return $this->getTestingInstance();
 		}
@@ -311,9 +364,13 @@ public function getCloudInstance(): string {
 	/**
 	 * @throws UnknownInterfaceException
 	 */
-	public function getCloudPath(string $route = '', array $args = []): string {
+	public function getCloudPath(string $route = '', array $args = [], int $interface = 0): string {
+		if ($interface === 0) {
+			$interface = $this->getCurrentInterface();
+		}
+
 		$scheme = '';
-		switch ($this->getCurrentInterface()) {
+		switch ($interface) {
 			case self::IFACE_INTERNAL:
 				$scheme = $this->configService->getAppValue(ConfigService::INTERNAL_CLOUD_SCHEME);
 				break;
@@ -371,10 +428,83 @@ public function getLocalInstance(): string {
 	}
 
 
+	/**
+	 * @param string $route
+	 * @param array $args
+	 *
+	 * @return string
+	 */
+	public function getLocalPath(string $route, array $args): string {
+		$base = $this->configService->getAppValue(ConfigService::FRONTAL_CLOUD_BASE);
+		if ($base === '') {
+			return $this->configService->getLoopbackPath($route, $args);
+		}
+
+		return rtrim($base, '/') . $this->urlGenerator->linkToRoute($route, $args);
+	}
+
+
+	/**
+	 * should be used when trying to generate an address
+	 *
+	 * @param string $route
+	 * @param array $args
+	 *
+	 * @return string
+	 */
+	public function getFrontalPath(string $route, array $args): string {
+		$frontalBase = $this->configService->getAppValue(ConfigService::FRONTAL_CLOUD_BASE);
+		if ($frontalBase !== '') {
+			return $this->getLocalPath($route, $args);
+		}
+
+		if ($this->isInterfaceConfigured(self::IFACE_FRONTAL)) {
+			try {
+				return $this->getCloudPath($route, $args, self::IFACE_FRONTAL);
+			} catch (UnknownInterfaceException $e) {
+			}
+		}
+
+		$ifaces = [self::IFACE0, self::IFACE1, self::IFACE2, self::IFACE3, self::IFACE4];
+		foreach ($ifaces as $iface) {
+			if ($this->isInterfaceConfigured($iface) && !$this->isInterfaceInternal($iface)) {
+				try {
+					return $this->getCloudPath($route, $args, $iface);
+				} catch (UnknownInterfaceException $e) {
+				}
+			}
+		}
+
+		if ($this->isInterfaceConfigured(self::IFACE_INTERNAL)) {
+			try {
+				return $this->getCloudPath($route, $args, self::IFACE_INTERNAL);
+			} catch (UnknownInterfaceException $e) {
+			}
+		}
+
+		foreach ($ifaces as $iface) {
+			if ($this->isInterfaceConfigured($iface) && $this->isInterfaceInternal($iface)) {
+				try {
+					return $this->getCloudPath($route, $args, $iface);
+				} catch (UnknownInterfaceException $e) {
+				}
+			}
+		}
+
+		try {
+			return $this->getCloudPath($route, $args);
+		} catch (UnknownInterfaceException $e) {
+		}
+
+		return $this->getLocalPath($route, $args);
+	}
+
+
 	/**
 	 * @return string
 	 */
 	private function getTestingInstance(): string {
 		return $this->configService->getAppValue(ConfigService::IFACE_TEST_ID);
 	}
+
 }
diff --git a/lib/Service/ShareTokenService.php b/lib/Service/ShareTokenService.php
index 399c19b66..2c36f0dc4 100644
--- a/lib/Service/ShareTokenService.php
+++ b/lib/Service/ShareTokenService.php
@@ -35,6 +35,7 @@
 use OCA\Circles\Db\ShareTokenRequest;
 use OCA\Circles\Exceptions\ShareTokenAlreadyExistException;
 use OCA\Circles\Exceptions\ShareTokenNotFoundException;
+use OCA\Circles\Exceptions\UnknownInterfaceException;
 use OCA\Circles\Model\Member;
 use OCA\Circles\Model\ShareToken;
 use OCA\Circles\Model\ShareWrapper;
@@ -56,19 +57,31 @@ class ShareTokenService {
 	/** @var ShareTokenRequest */
 	private $shareTokenRequest;
 
+	/** @var ConfigService */
+	private $configService;
+
+	/** @var InterfaceService */
+	private $interfaceService;
+
 
 	/**
 	 * ShareTokenService constructor.
 	 *
 	 * @param IURLGenerator $urlGenerator
 	 * @param ShareTokenRequest $shareTokenRequest
+	 * @param InterfaceService $interfaceService
+	 * @param ConfigService $configService
 	 */
 	public function __construct(
 		IURLGenerator $urlGenerator,
-		ShareTokenRequest $shareTokenRequest
+		ShareTokenRequest $shareTokenRequest,
+		InterfaceService $interfaceService,
+		ConfigService $configService
 	) {
 		$this->urlGenerator = $urlGenerator;
 		$this->shareTokenRequest = $shareTokenRequest;
+		$this->interfaceService = $interfaceService;
+		$this->configService = $configService;
 	}
 
 
@@ -87,7 +100,7 @@ public function generateShareToken(
 		string $password = ''
 	): ShareToken {
 		if ($member->getUserType() !== Member::TYPE_MAIL
-		&& $member->getUserType() !== Member::TYPE_CONTACT) {
+			&& $member->getUserType() !== Member::TYPE_CONTACT) {
 			throw new ShareTokenNotFoundException();
 		}
 
@@ -119,7 +132,7 @@ public function generateShareToken(
 	 * @param ShareToken $shareToken
 	 */
 	public function setShareTokenLink(ShareToken $shareToken): void {
-		$link = $this->urlGenerator->linkToRouteAbsolute(
+		$link = $this->interfaceService->getFrontalPath(
 			'files_sharing.sharecontroller.showShare',
 			['token' => $shareToken->getToken()]
 		);