Username Change

We are planning to change our username syntax in the near future.
This means when users login with their new username, it cannot match the existing user.

Is there a way to bulk change this using the plugin? We can export any fields from Active Directory to a csv file for any import\update, if needed.

Usernames will be changing from surnamefirstinitial to firstname.surname

Thanks in advance.

https://ww.wp.xz.cn/plugins/active-directory-integration/