diff --git a/do_preinstall.sh b/do_preinstall.sh
index 0f1550bd947e9ee6ed0ad627519607b56058dfb1..dc64772241c672416f121501af236d5f2fd3417f 100755
--- a/do_preinstall.sh
+++ b/do_preinstall.sh
@@ -56,6 +56,7 @@ echo "Generating initial config"
 safe_run gen_config
 
 echo "Instanciating server"
+safe_run ssh partage net setlocalsid ´ldapsearch -x sambaDomainName=* | grep sambaSID | awk -F " " '{print $2}'´
 safe_run instance
 
 echo "Running diagnostic"