diff --git a/mail_environment/models/fetchmail_server.py b/mail_environment/models/fetchmail_server.py
index 99d5ddf..4332231 100644
--- a/mail_environment/models/fetchmail_server.py
+++ b/mail_environment/models/fetchmail_server.py
@@ -27,6 +27,7 @@ class FetchmailServer(models.Model):
             "microsoft_outlook_refresh_token": {},
             "microsoft_outlook_access_token": {},
             "microsoft_outlook_access_token_expiration": {},
+            "use_microsoft_outlook_service": {},
         }
         mail_fields.update(base_fields)
         return mail_fields