diff --git a/ocs_ci/deployment/helpers/external_cluster_helpers.py b/ocs_ci/deployment/helpers/external_cluster_helpers.py
index ab590486c82..7b54f958dc0 100644
--- a/ocs_ci/deployment/helpers/external_cluster_helpers.py
+++ b/ocs_ci/deployment/helpers/external_cluster_helpers.py
@@ -137,10 +137,16 @@ def get_external_cluster_details(self):
             params = f"{params} --run-as-user {ceph_user}"
 
         if config.EXTERNAL_MODE.get("use_rbd_namespace"):
-            rbd_namespace = config.EXTERNAL_MODE.get(
-                "rbd_namespace"
-            ) or self.create_rbd_namespace(rbd=rbd_name)
+            rbd_namespace = config.EXTERNAL_MODE.get("rbd_namespace")
+            if not rbd_namespace:
+                rbd_namespace = self.create_rbd_namespace(rbd=rbd_name)
+                config.EXTERNAL_MODE["rbd_namespace"] = rbd_namespace
+
             params = f"{params} --rados-namespace {rbd_namespace}"
+            if "restricted-auth-permission" not in params:
+                params += " --restricted-auth-permission true"
+            if "cluster-name" not in params:
+                params += f" --k8s-cluster-name {cluster_name}"
 
         out = self.run_exporter_script(params=params)
 
diff --git a/ocs_ci/helpers/helpers.py b/ocs_ci/helpers/helpers.py
index 88ba5d2d761..89325ec8fed 100644
--- a/ocs_ci/helpers/helpers.py
+++ b/ocs_ci/helpers/helpers.py
@@ -685,6 +685,7 @@ def default_storage_class(
         OCS: Existing StorageClass Instance
     """
     external = config.DEPLOYMENT["external_mode"]
+    rbd_namespace = config.EXTERNAL_MODE.get("rbd_namespace")
     custom_storage_class = config.ENV_DATA.get("custom_default_storageclass_names")
     if custom_storage_class:
         from ocs_ci.ocs.resources.storage_cluster import (
@@ -702,7 +703,9 @@ def default_storage_class(
                     f"StorageCluster spec doesn't have the custom name for '{constants.CEPHBLOCKPOOL}' storageclass"
                 )
         else:
-            if external:
+            if rbd_namespace:
+                resource_name = f"{constants.DEFAULT_EXTERNAL_MODE_STORAGECLASS_RBD_NAMESPACE_PREFIX}-{rbd_namespace}"
+            elif external:
                 resource_name = constants.DEFAULT_EXTERNAL_MODE_STORAGECLASS_RBD
             elif config.ENV_DATA["platform"].lower() in constants.HCI_PC_OR_MS_PLATFORM:
                 storage_class = OCP(kind="storageclass")
diff --git a/ocs_ci/ocs/constants.py b/ocs_ci/ocs/constants.py
index 57586b40f65..046c18603f1 100644
--- a/ocs_ci/ocs/constants.py
+++ b/ocs_ci/ocs/constants.py
@@ -481,6 +481,9 @@
 DEFAULT_EXTERNAL_MODE_STORAGECLASS_RBD_THICK = (
     f"{DEFAULT_CLUSTERNAME_EXTERNAL_MODE}-ceph-rbd-thick"
 )
+DEFAULT_EXTERNAL_MODE_STORAGECLASS_RBD_NAMESPACE_PREFIX = (
+    f"{DEFAULT_EXTERNAL_MODE_STORAGECLASS_RBD}-rados-namespace"
+)
 
 # Default StorageClass for Provider-mode
 DEFAULT_STORAGECLASS_CLIENT_CEPHFS = f"{DEFAULT_CLUSTERNAME_CLIENT}-cephfs"
diff --git a/ocs_ci/ocs/resources/storage_cluster.py b/ocs_ci/ocs/resources/storage_cluster.py
index 99f8845beac..e9f642b5b85 100644
--- a/ocs_ci/ocs/resources/storage_cluster.py
+++ b/ocs_ci/ocs/resources/storage_cluster.py
@@ -464,9 +464,12 @@ def ocs_install_verification(
         )
 
     elif config.DEPLOYMENT["external_mode"]:
-        sc_rbd = storage_class.get(
-            resource_name=constants.DEFAULT_EXTERNAL_MODE_STORAGECLASS_RBD
-        )
+        rbd_namespace = config.EXTERNAL_MODE.get("rbd_namespace")
+        if rbd_namespace:
+            rbd_resource_name = f"{constants.DEFAULT_EXTERNAL_MODE_STORAGECLASS_RBD_NAMESPACE_PREFIX}-{rbd_namespace}"
+        else:
+            rbd_resource_name = constants.DEFAULT_EXTERNAL_MODE_STORAGECLASS_RBD
+        sc_rbd = storage_class.get(resource_name=rbd_resource_name)
         sc_cephfs = storage_class.get(
             resource_name=(constants.DEFAULT_EXTERNAL_MODE_STORAGECLASS_CEPHFS)
         )