diff --git a/client_software/0050_nextcloud_desktopclient/user_run.sh b/client_software/0050_nextcloud_desktopclient/user_run.sh
index d822e8f..8657bf7 100755
--- a/client_software/0050_nextcloud_desktopclient/user_run.sh
+++ b/client_software/0050_nextcloud_desktopclient/user_run.sh
@@ -93,6 +93,35 @@ for i in {0..99}; do
             echo "Please check the above output!"
             exit 1
         fi
+        # The Flatpak autoprovisioning may not successfully write the apppassword to
+        # KWallet from inside the sandbox, so write it directly via D-Bus.
+        # Nextcloud stores HTTP credentials in folder "Nextcloud" with keys:
+        #   user:url/:0            (legacy password entry)
+        #   user_app-password:url/:0  (app password entry, used for auth)
+        NC_WALLET_URL="https://${SERVERFQDN_NC}/"
+        NC_WALLET_APPID="logon_script"
+        NC_QB_CMD="qdbus-qt6"
+        if ! command -v ${NC_QB_CMD} >/dev/null 2>&1; then NC_QB_CMD="qdbus"; fi
+        NC_QB_SVC="org.kde.kwalletd"
+        NC_QB_PATH="/modules/kwalletd6"
+        if ! ( ${NC_QB_CMD} "${NC_QB_SVC}" | grep -q "${NC_QB_PATH}" ); then
+            NC_QB_PATH="/modules/kwalletd5"
+        fi
+        echo "Writing Nextcloud app password to KWallet via D-Bus (${NC_QB_PATH})"
+        NC_WALLET_HANDLE=$(${NC_QB_CMD} ${NC_QB_SVC} ${NC_QB_PATH} org.kde.KWallet.open "kdewallet" 0 "${NC_WALLET_APPID}")
+        if [[ -n "${NC_WALLET_HANDLE}" && "${NC_WALLET_HANDLE}" != "-1" ]]; then
+            HAS_FOLDER=$(${NC_QB_CMD} ${NC_QB_SVC} ${NC_QB_PATH} org.kde.KWallet.hasFolder "${NC_WALLET_HANDLE}" "Nextcloud" "${NC_WALLET_APPID}")
+            if [[ "${HAS_FOLDER}" != "true" ]]; then
+                ${NC_QB_CMD} ${NC_QB_SVC} ${NC_QB_PATH} org.kde.KWallet.createFolder "${NC_WALLET_HANDLE}" "Nextcloud" "${NC_WALLET_APPID}" >/dev/null
+            fi
+            ${NC_QB_CMD} ${NC_QB_SVC} ${NC_QB_PATH} org.kde.KWallet.writePassword "${NC_WALLET_HANDLE}" "Nextcloud" "${DAVTOKEN_USER}:${NC_WALLET_URL}:0" "${DAVTOKEN_PASS}" "${NC_WALLET_APPID}" >/dev/null
+            ${NC_QB_CMD} ${NC_QB_SVC} ${NC_QB_PATH} org.kde.KWallet.writePassword "${NC_WALLET_HANDLE}" "Nextcloud" "${DAVTOKEN_USER}_app-password:${NC_WALLET_URL}:0" "${DAVTOKEN_PASS}" "${NC_WALLET_APPID}" >/dev/null
+            ${NC_QB_CMD} ${NC_QB_SVC} ${NC_QB_PATH} org.kde.KWallet.sync "${NC_WALLET_HANDLE}" "${NC_WALLET_APPID}" >/dev/null
+            ${NC_QB_CMD} ${NC_QB_SVC} ${NC_QB_PATH} org.kde.KWallet.close "${NC_WALLET_HANDLE}" false "${NC_WALLET_APPID}" >/dev/null
+            echo "Nextcloud app password written to KWallet successfully."
+        else
+            echo "Warning: Could not open KWallet (handle: ${NC_WALLET_HANDLE}). Nextcloud may prompt for credentials on next start."
+        fi
     fi
 done