diff --git a/ldapcherry/__init__.py b/ldapcherry/__init__.py
index 6f5eb9b..aba45f6 100644
--- a/ldapcherry/__init__.py
+++ b/ldapcherry/__init__.py
@@ -79,11 +79,34 @@ def exception_decorator(func):
             if not username:
                 return self.temp_service_unavailable.render()
             is_admin = self._check_admin()
-            return self.temp_error.render(
-                is_admin=is_admin,
-                alert='danger',
-                message="An error occured, please check logs for details"
-                )
+            et = type(e)
+            if et is UserDoesntExist:
+                user = e.user
+                return self.temp_error.render(
+                    is_admin=is_admin,
+                    alert='danger',
+                    message="User '" + user + "' does not exist"
+                    )
+            elif et is UserAlreadyExists:
+                user = e.user
+                return self.temp_error.render(
+                    is_admin=is_admin,
+                    alert='warning',
+                    message="User '" + user + "' already exist"
+                    )
+            elif et is GroupDoesntExist:
+                group = e.group
+                return self.temp_error.render(
+                    is_admin=is_admin,
+                    alert='danger',
+                    message="Missing group, please check logs for details"
+                    )
+            else:
+                return self.temp_error.render(
+                    is_admin=is_admin,
+                    alert='danger',
+                    message="An error occured, please check logs for details"
+                    )
     return ret
 
 
@@ -535,6 +558,7 @@ class LdapCherry(object):
             try:
                 tmp = self.backends[b].get_user(username)
             except UserDoesntExist as e:
+                self._handle_exception(e)
                 tmp = {}
             for attr in tmp:
                 if attr in self.attributes.backend_attributes[b]:
@@ -1076,7 +1100,7 @@ class LdapCherry(object):
             return self.temp_error.render(
                 is_admin=is_admin,
                 alert='warning',
-                message="User doesn't exist"
+                message="User '" + user + "' does not exist"
                 )
         tmp = self._get_roles(user)
         user_roles = tmp['roles']
diff --git a/ldapcherry/backend/backendLdap.py b/ldapcherry/backend/backendLdap.py
index ccedfae..2d7f8bd 100644
--- a/ldapcherry/backend/backendLdap.py
+++ b/ldapcherry/backend/backendLdap.py
@@ -11,7 +11,9 @@ import ldap.modlist as modlist
 import ldap.filter
 import logging
 import ldapcherry.backend
-from ldapcherry.exceptions import UserDoesntExist, GroupDoesntExist
+from ldapcherry.exceptions import UserDoesntExist, \
+    GroupDoesntExist, \
+    UserAlreadyExists
 import os
 import re
 
@@ -311,6 +313,8 @@ class Backend(ldapcherry.backend.Backend):
         ldif = modlist.addModlist(attrs_str)
         try:
             ldap_client.add_s(dn, ldif)
+        except ldap.ALREADY_EXISTS as e:
+            raise UserAlreadyExists(attrs[self.key], self.backend_name)
         except Exception as e:
             ldap_client.unbind_s()
             self._exception_handler(e)
@@ -326,7 +330,7 @@ class Backend(ldapcherry.backend.Backend):
             ldap_client.delete_s(dn)
         else:
             ldap_client.unbind_s()
-            raise UserDoesntExist(username, self.backend_display_name)
+            raise UserDoesntExist(username, self.backend_name)
         ldap_client.unbind_s()
 
     def set_attrs(self, username, attrs):
@@ -417,7 +421,7 @@ class Backend(ldapcherry.backend.Backend):
                                 }
                     )
                 except ldap.NO_SUCH_OBJECT as e:
-                    raise GroupDoesntExist(group, self.backend_display_name)
+                    raise GroupDoesntExist(group, self.backend_name)
                 except Exception as e:
                     ldap_client.unbind_s()
                     self._exception_handler(e)
@@ -487,7 +491,7 @@ class Backend(ldapcherry.backend.Backend):
         ret = {}
         tmp = self._get_user(username, ALL_ATTRS)
         if tmp is None:
-            raise UserDoesntExist(username, self.backend_display_name)
+            raise UserDoesntExist(username, self.backend_name)
         attrs_tmp = tmp[1]
         for attr in attrs_tmp:
             value_tmp = attrs_tmp[attr]