diff --git a/src/k8s-extension/azext_k8s_extension/partner_extensions/azuremonitormetrics/dc/defaults.py b/src/k8s-extension/azext_k8s_extension/partner_extensions/azuremonitormetrics/dc/defaults.py
index 8dd7260377e..9acd2ae8e23 100644
--- a/src/k8s-extension/azext_k8s_extension/partner_extensions/azuremonitormetrics/dc/defaults.py
+++ b/src/k8s-extension/azext_k8s_extension/partner_extensions/azuremonitormetrics/dc/defaults.py
@@ -13,10 +13,10 @@
 # All DC* object names should end only in alpha numeric (after `length` trim)
 # DCE remove underscore from cluster name
 def sanitize_name(name, objtype, length):
+    name = name[0:length]
     length = length - 1
     if objtype == DC_TYPE.DCE:
-        name = name.replace("_", "")
-    name = name[0:length]
+        name = ''.join(char for char in name if char.isalnum() or char == '-')
     lastIndexAlphaNumeric = len(name) - 1
     while ((name[lastIndexAlphaNumeric].isalnum() is False) and lastIndexAlphaNumeric > -1):
         lastIndexAlphaNumeric = lastIndexAlphaNumeric - 1