diff --git a/src/java/davmail/exchange/ExchangeSessionFactory.java b/src/java/davmail/exchange/ExchangeSessionFactory.java
index 029a9981..cae84481 100644
--- a/src/java/davmail/exchange/ExchangeSessionFactory.java
+++ b/src/java/davmail/exchange/ExchangeSessionFactory.java
@@ -235,7 +235,7 @@ public final class ExchangeSessionFactory {
     private static void handleNetworkDown(Exception exc) throws DavMailException {
         if (!checkNetwork() || configChecked) {
             ExchangeSession.LOGGER.warn(BundleMessage.formatLog("EXCEPTION_NETWORK_DOWN"));
-            ExchangeSession.LOGGER.debug(exc);
+            ExchangeSession.LOGGER.debug(exc, exc);
             throw new NetworkDownException("EXCEPTION_NETWORK_DOWN");
         } else {
             BundleMessage message = new BundleMessage("EXCEPTION_CONNECT", exc.getClass().getName(), exc.getMessage());