diff --git a/Dockerfile b/Dockerfile
index 462e262..c9f282e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3-slim
+FROM cloudforet/python-core:2
 
 ENV PYTHONUNBUFFERED 1
 ENV SPACEONE_PORT 50051
diff --git a/README.md b/README.md
index bb1c6aa..e681d1d 100644
--- a/README.md
+++ b/README.md
@@ -1,17 +1,38 @@
 # plugin-azure-cost-mgmt-cost-datasource
 Plugin for collecting Azure Cost management data
 
+
 ---
+## Azure Service Endpoint(in use)
+<pre>
+https://*.blob.core.windows.net
+https://management.azure.com
+https://login.microsoftonline.com
+</pre>
 
+----
 ## Schema Data
 *Schema*
 - billing_account_id (str): 
 - tenant_id (str):
 - client_id (str):
 - client_secret (str):
+- customer_tenants (list):(Optional) Customer's tenant id list 
+
 
+*Example for EA*
+<pre>
+<code>
+{
+    "billing_account_id": "*****",
+    "tenant_id": "*****",
+    "client_id": "*****",
+    "client_secret": "*****"
+}
+</code>
+</pre>
 
-*Example*
+*Example for CSP*
 <pre>
 <code>
 {
@@ -19,6 +40,9 @@ Plugin for collecting Azure Cost management data
     "tenant_id": "*****",
     "client_id": "*****",
     "client_secret": "*****"
+    "customer_tenants":
+        - "*****"
+     
 }
 </code>
 </pre>
diff --git a/pkg/pip_requirements.txt b/pkg/pip_requirements.txt
index bdfe56c..b262926 100644
--- a/pkg/pip_requirements.txt
+++ b/pkg/pip_requirements.txt
@@ -1,8 +1,8 @@
 spaceone-core
 spaceone-api
-schematics
 azure-identity
 azure-mgmt-billing
 azure-mgmt-costmanagement
+schematics
 pandas
-
+python-dateutil
diff --git a/src/cloudforet/cost_analysis/manager/cost_manager.py b/src/cloudforet/cost_analysis/manager/cost_manager.py
index b1540a1..8356087 100644
--- a/src/cloudforet/cost_analysis/manager/cost_manager.py
+++ b/src/cloudforet/cost_analysis/manager/cost_manager.py
@@ -130,10 +130,11 @@ def _get_additional_info(self, result, options, tenant_id=None):
             if result.get('pricingmodel') == 'OnDemand' and result.get('metercategory') == '':
                 result['metercategory'] = result.get('metercategory')
 
-        if result.get('invoicesectionname') != '' and result.get('invoicesectionname'):
-            additional_info['Department Name'] = result.get('invoicesectionname')
-        elif result.get('departmentname') != '' and result.get('departmentname'):
-            additional_info['Department Name'] = result['departmentname']
+        if result.get('customername') is None:
+            if result.get('invoicesectionname') != '' and result.get('invoicesectionname'):
+                additional_info['Department Name'] = result.get('invoicesectionname')
+            elif result.get('departmentname') != '' and result.get('departmentname'):
+                additional_info['Department Name'] = result['departmentname']
 
         if result.get('accountname') != '' and result.get('accountname'):
             additional_info['Enrollment Account Name'] = result['accountname']
diff --git a/src/cloudforet/cost_analysis/manager/job_manager.py b/src/cloudforet/cost_analysis/manager/job_manager.py
index 001baa7..b40d6b5 100644
--- a/src/cloudforet/cost_analysis/manager/job_manager.py
+++ b/src/cloudforet/cost_analysis/manager/job_manager.py
@@ -1,5 +1,6 @@
 import logging
 from datetime import datetime, timedelta
+from dateutil.relativedelta import relativedelta
 
 from spaceone.core.manager import BaseManager
 from cloudforet.cost_analysis.connector.azure_cost_mgmt_connector import AzureCostMgmtConnector
@@ -72,7 +73,7 @@ def _get_start_month(self, start, last_synchronized_at=None):
             start_time: datetime = last_synchronized_at - timedelta(days=7)
             start_time = start_time.replace(day=1)
         else:
-            start_time: datetime = datetime.utcnow() - timedelta(days=365)
+            start_time: datetime = datetime.utcnow() - relativedelta(months=9)
             start_time = start_time.replace(day=1)
 
         start_time = start_time.replace(hour=0, minute=0, second=0, microsecond=0, tzinfo=None)