diff --git a/deployments/hostpools/uiFormDefinition.json b/deployments/hostpools/uiFormDefinition.json
index 59e1085..a54b516 100644
--- a/deployments/hostpools/uiFormDefinition.json
+++ b/deployments/hostpools/uiFormDefinition.json
@@ -2312,8 +2312,8 @@
 														"required": true,
 														"validations": [
 															{
-																"regex": "^(?![_-])[A-Za-z0-9_-]{1,13}(?<![_-])$",
-																"message": "The value must not contain spaces or end or begin with a dash or underscore."
+																"regex": "^(?![_.-])[A-Za-z0-9_.-]{1,13}(?<![_.-])$",
+																"message": "Name of the script/application without its file extension. Use 1-13 characters (letters, numbers, hyphens, underscores, periods). Must start and end with a letter or number."
 															}
 														]
 													}