diff --git a/nextcloud_backup/backend/src/routes/config.ts b/nextcloud_backup/backend/src/routes/config.ts
index 5f1db41..4fde6b2 100644
--- a/nextcloud_backup/backend/src/routes/config.ts
+++ b/nextcloud_backup/backend/src/routes/config.ts
@@ -5,6 +5,7 @@ import {
   validateBackupConfig,
 } from "../services/backupConfigService.js";
 import { getWebdavConfig, saveWebdavConfig, validateWebdavConfig } from "../services/webdavConfigService.js";
+import { checkWebdavLogin } from "../services/webdavService.js";
 
 const configRouter = express.Router();
 
@@ -31,6 +32,9 @@ configRouter.get("/webdav", (req, res, next) => {
 
 configRouter.put("/webdav", (req, res, next) => {
   validateWebdavConfig(req.body)
+    .then(() => {
+      return checkWebdavLogin(req.body, true)
+    })
     .then(() => {
       saveWebdavConfig(req.body);
       res.status(204);
@@ -38,7 +42,7 @@ configRouter.put("/webdav", (req, res, next) => {
     })
     .catch((error) => {
       res.status(400);
-      res.json(error.details);
+      res.json(error.details ? error.details : error);
     });
 });
 
diff --git a/nextcloud_backup/backend/src/routes/webdav.ts b/nextcloud_backup/backend/src/routes/webdav.ts
index b31734c..cad8eeb 100644
--- a/nextcloud_backup/backend/src/routes/webdav.ts
+++ b/nextcloud_backup/backend/src/routes/webdav.ts
@@ -16,6 +16,9 @@ webdavRouter.get("/backup/auto", (req, res, next) => {
   const config = getWebdavConfig();
   const backupConf = getBackupConfig();
   validateWebdavConfig(config)
+    .then(() => {
+      return webdavService.checkWebdavLogin(config);
+    })
     .then(async () => {
       const value = await webdavService
         .getBackups(pathTools.auto, config, backupConf.nameTemplate);
@@ -31,6 +34,9 @@ webdavRouter.get("/backup/manual", (req, res, next) => {
   const config = getWebdavConfig();
   const backupConf = getBackupConfig();
   validateWebdavConfig(config)
+    .then(() => {
+      return webdavService.checkWebdavLogin(config);
+    })
     .then(async () => {
       const value = await webdavService
         .getBackups(pathTools.manual, config, backupConf.nameTemplate);
@@ -49,6 +55,9 @@ webdavRouter.delete("/", (req, res, next) => {
   validateWebdavConfig(config).then(() => {
    validator
       .validateAsync(body)
+      .then(() => {
+        return webdavService.checkWebdavLogin(config);
+      })
       .then(() => {
         webdavService.deleteBackup(body.path, config)
           .then(()=>{