diff --git a/auth0/v3/management/users_by_email.py b/auth0/v3/management/users_by_email.py
index 0c92e6a4..24622a9c 100644
--- a/auth0/v3/management/users_by_email.py
+++ b/auth0/v3/management/users_by_email.py
@@ -39,7 +39,7 @@ def search_users_by_email(self, email, fields=None, include_fields=True):
         See: https://auth0.com/docs/api/management/v2#!/Users_By_Email/get_users_by_email
         """
         params = {
-            'email': email.lower(),
+            'email': email,
             'fields': fields and ','.join(fields) or None,
             'include_fields': str(include_fields).lower()
         }
diff --git a/auth0/v3/test/management/test_users_by_email.py b/auth0/v3/test/management/test_users_by_email.py
index 012c597e..2c6e9af3 100644
--- a/auth0/v3/test/management/test_users_by_email.py
+++ b/auth0/v3/test/management/test_users_by_email.py
@@ -16,7 +16,7 @@ def test_search_users_by_email(self, mock_rc):
 
         self.assertEqual('https://domain/api/v2/users-by-email', args[0])
         self.assertEqual(kwargs['params'], {
-            'email': 'a@b.com',
+            'email': 'A@B.com',
             'fields': None,
             'include_fields': 'true'
         })