diff -Naur src/com/openexchange/umin.orig/OXUsermin.java src/com/openexchange/umin/OXUsermin.java
--- src/com/openexchange/umin.orig/OXUsermin.java	2007-01-03 16:38:14.000000000 +0100
+++ src/com/openexchange/umin/OXUsermin.java	2007-01-03 17:35:07.000000000 +0100
@@ -404,7 +404,10 @@
 	
 	Hashtable env = new Hashtable(4);
 	env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
-	env.put(Context.PROVIDER_URL, "ldap://"+host+":"+port+"/"+baseDN);
+	if (host.startsWith("ldaps://")) {
+		env.put("java.naming.ldap.factory.socket", "com.openexchange.tools.ssl.TrustAllSSLSocketFactory");
+	}
+	env.put(Context.PROVIDER_URL, host+":"+port+"/"+baseDN);
 	env.put(Context.SECURITY_AUTHENTICATION,"simple");
 	env.put(Context.SECURITY_PRINCIPAL, bindDN);
 	env.put(Context.SECURITY_CREDENTIALS, bindPW);