Looking for logging into the Bitrix User site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Bitrix User site. After that you can login as usual with your login credentials.
https://dev.1c-bitrix.ru/api_help/main/reference/cuser/login.php
https://helpdesk.bitrix24.com/open/5518243/
https://helpdesk.bitrix24.com/open/1332414/
https://www.bitrix24.de/
https://helpdesk.bitrix24.de/open/1332482/
https://helpdesk.bitrix24.de/open/5514909/
https://www.bitrix24.de/about/blogs/tipps/die-zugriffsrechte-im-crm-bitrix24-fuer-jeden-einzelnen-mitarbeiter-.php
https://helpdesk.bitrix24.de/open/6413371/
https://helpdesk.bitrix24.de/open/5004847/
https://www.bitrix24.net/
http://bxapi.ru/src/?module_id=main&name=CUser%3A%3ALogin
https://www.bitrix24.eu/
https://stackoverflow.com/questions/25711359/how-to-get-the-default-user-data-to-a-bitrix-form