diff --git a/datamodels/2.x/itop-hub-connector/ajax.php b/datamodels/2.x/itop-hub-connector/ajax.php
index 3196379b80..335ae804f7 100644
--- a/datamodels/2.x/itop-hub-connector/ajax.php
+++ b/datamodels/2.x/itop-hub-connector/ajax.php
@@ -154,6 +154,8 @@ function ReportError($sMessage, $iErrorCode, $aMoreFields = array())
 
 try
 {
+	SetupUtils::ExitMaintenanceMode(false); // Reset maintenance mode in case of problem
+
 	utils::PushArchiveMode(false);
 	
 	ini_set('max_execution_time', max(3600, ini_get('max_execution_time'))); // Under Windows SQL/backup operations are part of the PHP timeout and require extra time
@@ -307,7 +309,8 @@ try
 			unlink(APPROOT.'data/hub/compile_authent');
 			// Load the "production" config file to clone & update it
 			$oConfig = new Config(APPCONF.'production/'.ITOP_CONFIG_FILE);
-			
+			SetupUtils::EnterMaintenanceMode($oConfig);
+
 			$oRuntimeEnv->InitDataModel($oConfig, true /* model only */);
 			
 			$aAvailableModules = $oRuntimeEnv->AnalyzeInstallation($oConfig, $oRuntimeEnv->GetBuildDir(), true);
@@ -376,6 +379,10 @@ try
 			SetupPage::log_error('Debug trace: '.$e->getTraceAsString());
 			ReportError($e->getMessage(), $e->getCode());
 		}
+		finally
+		{
+			SetupUtils::ExitMaintenanceMode();
+		}
 		break;
 		
 		default:
diff --git a/datamodels/2.x/itop-hub-connector/land.php b/datamodels/2.x/itop-hub-connector/land.php
index d4fdf9fbb2..e3f209084f 100644
--- a/datamodels/2.x/itop-hub-connector/land.php
+++ b/datamodels/2.x/itop-hub-connector/land.php
@@ -255,7 +255,7 @@ function DoInstall(WebPage $oPage)
     $sStatusPageUrl = utils::GetAbsoluteUrlModulePage('itop-hub-connector', 'land.php', array('operation' => 'done'));
     
     $aWidgetParams = array(
-        'self_url' => utils::GetAbsoluteUrlModulePage('itop-hub-connector', 'ajax.php'),
+        'self_url' => utils::GetAbsoluteUrlModulePage('itop-hub-connector', 'ajax.php', array('maintenance' => true)),
         'iframe_url' => $sIframeUrl, 
         'redirect_after_completion_url' => $sStatusPageUrl,
         'mysql_bindir' => MetaModel::GetConfig()->GetModuleSetting('itop-backup', 'mysql_bindir', ''),