Looking for logging into the Ms Custom 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 Ms Custom site. After that you can login as usual with your login credentials.
https://ja.wordpress.org/plugins/ms-custom-login/
http://mignonstyle.com/ms-custom-login/
http://wp-notebook.com/intro/bm-custom-login/
http://www.hiskip.com/wp/plugin/ui/login-page/5633.html
http://www.hiskip.com/wp/plugin/ui/login-page/7056.html
http://www.billionplan.com/blog/design/wp-login-customize.html
https://n-hokkaido.com/722.html
https://wpno.jp/2017/06/5292/
https://powerapps.microsoft.com/ja-jp/
https://techcommunity.microsoft.com/t5/Azure-Active-Directory-Identity/Using-Azure-AD-to-land-users-on-their-custom-login-page-from/ba-p/243900
https://www.youtube.com/watch?v=7zgDqzuL_fA
https://www.youtube.com/watch?v=M3mLntGSPxA
https://www.youtube.com/watch?v=EPywUJUJed0