diff --git a/seahub/api2/authentication.py b/seahub/api2/authentication.py
index 2ecaddb0dd..5e3e61eaa0 100644
--- a/seahub/api2/authentication.py
+++ b/seahub/api2/authentication.py
@@ -5,7 +5,7 @@ from rest_framework import status
 from rest_framework.authentication import BaseAuthentication
 from rest_framework.exceptions import APIException
 
-import seaserv
+from seaserv import ccnet_api
 from seahub.base.accounts import User
 from seahub.api2.models import Token, TokenV2
 from seahub.api2.utils import get_client_ip
@@ -78,7 +78,7 @@ class TokenAuthentication(BaseAuthentication):
             raise AuthenticationFailed('User inactive or deleted')
 
         if MULTI_TENANCY:
-            orgs = seaserv.get_orgs_by_user(token.user)
+            orgs = ccnet_api.get_orgs_by_user(token.user)
             if orgs:
                 user.org = orgs[0]
 
@@ -103,7 +103,7 @@ class TokenAuthentication(BaseAuthentication):
             raise AuthenticationFailed('User inactive or deleted')
 
         if MULTI_TENANCY:
-            orgs = seaserv.get_orgs_by_user(token.user)
+            orgs = ccnet_api.get_orgs_by_user(token.user)
             if orgs:
                 user.org = orgs[0]
 
diff --git a/seahub/base/accounts.py b/seahub/base/accounts.py
index a9d2ce0764..1efecd04c3 100644
--- a/seahub/base/accounts.py
+++ b/seahub/base/accounts.py
@@ -217,7 +217,7 @@ class User(object):
 
         orgs = []
         if is_pro_version():
-            orgs = ccnet_threaded_rpc.get_orgs_by_user(username)
+            orgs = ccnet_api.get_orgs_by_user(username)
 
         # remove owned repos
         owned_repos = []
diff --git a/seahub/base/middleware.py b/seahub/base/middleware.py
index d66fc29694..7ba143934a 100644
--- a/seahub/base/middleware.py
+++ b/seahub/base/middleware.py
@@ -5,7 +5,7 @@ from django.core.cache import cache
 from django.core.urlresolvers import reverse
 from django.http import HttpResponseRedirect
 
-import seaserv
+from seaserv import ccnet_api
 
 from seahub.notifications.models import Notification
 from seahub.notifications.utils import refresh_cache
@@ -32,7 +32,7 @@ class BaseMiddleware(object):
             request.cloud_mode = True
 
             if MULTI_TENANCY:
-                orgs = seaserv.get_orgs_by_user(username)
+                orgs = ccnet_api.get_orgs_by_user(username)
                 if orgs:
                     request.user.org = orgs[0]
         else:
diff --git a/seahub/views/ajax.py b/seahub/views/ajax.py
index 4825164d45..649ad0805a 100644
--- a/seahub/views/ajax.py
+++ b/seahub/views/ajax.py
@@ -1368,7 +1368,7 @@ def space_and_traffic(request):
     username = request.user.username
 
     # space & quota calculation
-    org = ccnet_threaded_rpc.get_orgs_by_user(username)
+    org = ccnet_api.get_orgs_by_user(username)
     if not org:
         space_quota = seafile_api.get_user_quota(username)
         space_usage = seafile_api.get_user_self_usage(username)
diff --git a/seahub/views/sysadmin.py b/seahub/views/sysadmin.py
index cd5a27f2fa..e564c05f01 100644
--- a/seahub/views/sysadmin.py
+++ b/seahub/views/sysadmin.py
@@ -132,7 +132,7 @@ def _populate_user_quota_usage(user):
     Arguments:
     - `user`:
     """
-    orgs = ccnet_threaded_rpc.get_orgs_by_user(user.email)
+    orgs = ccnet_api.get_orgs_by_user(user.email)
     try:
         if orgs:
             user.org = orgs[0]
@@ -502,7 +502,7 @@ def user_info(request, email):
     org_name = None
     space_quota = space_usage = 0
 
-    org = ccnet_threaded_rpc.get_orgs_by_user(email)
+    org = ccnet_api.get_orgs_by_user(email)
     if not org:
         owned_repos = mute_seafile_api.get_owned_repo_list(email,
                                                            ret_corrupted=True)
@@ -646,7 +646,7 @@ def user_set_quota(request, email):
         space_quota_mb = f.cleaned_data['space_quota']
         space_quota = space_quota_mb * get_file_size_unit('MB')
 
-        org = ccnet_threaded_rpc.get_orgs_by_user(email)
+        org = ccnet_api.get_orgs_by_user(email)
         try:
             if not org:
                 seafile_api.set_user_quota(email, space_quota)
@@ -702,7 +702,7 @@ def user_remove(request, email):
 
     try:
         user = User.objects.get(email=email)
-        org = ccnet_threaded_rpc.get_orgs_by_user(user.email)
+        org = ccnet_api.get_orgs_by_user(user.email)
         if org:
             if org[0].creator == user.email:
                 messages.error(request, _(u'Failed to delete: the user is an organization creator'))