diff --git a/src/java/davmail/DavGateway.java b/src/java/davmail/DavGateway.java
index 9ee15d16..17d024c1 100644
--- a/src/java/davmail/DavGateway.java
+++ b/src/java/davmail/DavGateway.java
@@ -77,13 +77,6 @@ public class DavGateway {
 
         // register custom SSL Socket factory
         DavGatewaySSLProtocolSocketFactory.register();
-        // check config
-        try {
-            ExchangeSessionFactory.checkConfig();
-        } catch (IOException e) {
-            DavGatewayTray.error(e);
-        }
-
     }
 
     protected static void stopServer(AbstractServer server) {