search_filter = "(&(mail={})(|(cernAccountType=Primary)(cernAccountType=Service)))".format(email)

app/services/ldap/cern_ldap_client.py

@@ -96,7 +96,7 @@ class CernLdapClient:
 
     def get_user_by_email(self, email, external=False):
         dn_to_use = self.base_dn
-        search_filter = "(&(userPrincipalName={})(|(cernAccountType=Primary)(cernAccountType=Service)))".format(email)
+        search_filter = "(&(mail={})(|(cernAccountType=Primary)(cernAccountType=Service)))".format(email)
         if external:
             dn_to_use = self.base_dn_external
             search_filter = "(mail={})".format(email)