diff --git a/orm/services/customer_manager/cms_rest/data/sql_alchemy/models.py b/orm/services/customer_manager/cms_rest/data/sql_alchemy/models.py
index 0dc9bef7..b70cb675 100755
--- a/orm/services/customer_manager/cms_rest/data/sql_alchemy/models.py
+++ b/orm/services/customer_manager/cms_rest/data/sql_alchemy/models.py
@@ -137,10 +137,17 @@ class Groups(Base, CMSBaseModel):
         roles = sorted(set(customer_roles + domain_roles))
 
         users = []
+        unique_domain = {}
         for user in self.groups_users:
             if user.region_id == -1:
-                users.append(GroupWsmeModels.User(id=[user.user.name],
-                                                  domain=user.domain_name))
+                if user.domain_name in unique_domain:
+                    unique_domain[user.domain_name].append(user.user.name)
+                else:
+                    unique_domain[user.domain_name] = [user.user.name]
+
+        for domain, domain_user in unique_domain.items():
+            users.append(GroupWsmeModels.User(id=domain_user,
+                                              domain=domain))
 
         result = GroupWsmeModels.Group(description=description,
                                        name=name,
@@ -198,12 +205,19 @@ class GroupsRegion(Base, CMSBaseModel):
     def to_wsme(self):
         name = self.region.name
         type = self.region.type
-        users = []
 
+        users = []
+        unique_domain = {}
         for user in self.group_region_users:
             if user.region_id != -1:
-                users.append(GroupWsmeModels.User(id=[user.user.name],
-                                                  domain=user.domain_name))
+                if user.domain_name in unique_domain:
+                    unique_domain[user.domain_name].append(user.user.name)
+                else:
+                    unique_domain[user.domain_name] = [user.user.name]
+
+        for domain, domain_user in unique_domain.items():
+            users.append(GroupWsmeModels.User(id=domain_user,
+                                              domain=domain))
 
         region = GroupWsmeModels.Region(name=name,
                                         type=type,