integrate Bitrix24 with Active Directory

https://www.bitrix24.com/about/blogs/bitrix24-tips-and-updates/yes-you-can-integrate-bitrix24-with-active-directory-and-this-is-how-i.php

Installing Bitrix24 Self-hosted

https://training.bitrix24.com/support/training/course/?COURSE_ID=58&LESSON_ID=5907