diff --git a/GherkinSyncTool.Synchronizers.TestRail/Utils/TestRailCaseFields.cs b/GherkinSyncTool.Synchronizers.TestRail/Utils/TestRailCaseFields.cs
index d5b2851..f9d73c4 100644
--- a/GherkinSyncTool.Synchronizers.TestRail/Utils/TestRailCaseFields.cs
+++ b/GherkinSyncTool.Synchronizers.TestRail/Utils/TestRailCaseFields.cs
@@ -51,7 +51,7 @@ public void CheckCustomFields()
                 if (!projectIds.Contains(_testRailSettings.ProjectId))
                 {
                     throw new ArgumentException(
-                        $"\r\nOne of the required fields: \"{field.SystemName}\" should be global or attached to the project with id: {_testRailSettings.ProjectId}\r\n");
+                        $"\r\nOne of the required fields: \"{field.SystemName}\" should be global or attached to the project with id: {_testRailSettings.ProjectId}. Please open TestRail Customizations menu and configure field with System Name '\"{field.SystemName}\"'\r\n");
                 }
             }
         }