Looking for logging into the Additional 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 Additional site. After that you can login as usual with your login credentials.
https://answers.microsoft.com/en-us/windows/forum/all/additional-log-on-information-may-be-required/d5be5c1c-f9aa-4f06-943e-03d8cb305a57
https://social.technet.microsoft.com/Forums/en-US/44294571-86b1-4c6a-bdcf-a33cf9cd3fa2/additional-logon-information-may-be-required-windows-7?forum=winservergen
https://support.opendns.com/hc/en-us/community/posts/220028607-Additional-log-on-Information-My-be-required-pop-up
http://capitalhead.com/articles/no-internet-access-or-additional-log-on-information-may-be-required-in-windows-7-x64-lan-and-wi-fi.aspx
https://www.sevenforums.com/network-sharing/42785-additional-log-may-required-warning.html
https://forums.windowssecrets.com/showthread.php/150392-quot-Additional-login-information-may-be-required-quot
https://stackoverflow.com/questions/19891577/how-to-detect-that-additional-log-on-information-may-be-required-when-connecti
https://www.yellowwebmonkey.com/admin-functions/item/additional-login
https://zapier.com/blog/open-wifi-login-page/
https://learninglaravel.net/laravel-54-additional-login-conditions
https://help.twitter.com/en/managing-your-account/additional-information-request-at-login
https://support.gaijin.net/hc/en-us/articles/115005277969-Additional-e-mail-addresses-binding-Linked-e-mail-addresses-removal-Login-management
https://www.specmeters.com/general-items/specconnect/specconnect-additional-login-1-yr-/