Looking for logging into the Umbraco 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 Umbraco site. After that you can login as usual with your login credentials.
https://our.umbraco.com/member/login
https://our.umbraco.com/documentation/Getting-Started/Backoffice/Login/
https://shop.umbraco.com/
https://our.umbraco.com/forum/using-umbraco-and-getting-started/87042-umbraco-7-back-end-login-fails
https://our.umbraco.com/forum/using-umbraco-and-getting-started/78192-tutorial-how-to-create-member-login-and-logout-form-in-umbraco-mvc
https://our.umbraco.com/forum/using-umbraco-and-getting-started/88265-backoffice-login-with-name-not-email-771
https://our.umbraco.com/forum/umbraco-7/using-umbraco-7/48951-Member-login-in-Umbraco-7
https://our.umbraco.com/forum/using-umbraco-and-getting-started/88207-username-for-cms-login-rather-than-email
http://www.jondjones.com/learn-umbraco-cms/umbraco-content-editors-user-guide/how-to-access-the-umbraco-login-page
https://stackoverflow.com/questions/52201762/how-to-validate-umbraco-user-through-email-and-login-user-without-using-the-stan
https://stackoverflow.com/questions/53498116/use-umbraco-membership-login-authentication-info-to-authenticate-another-project
http://www.valx.eu/umbraco/login.aspx?redir=%2Fumbraco%2Fumbraco.aspx
https://github.com/umbraco/UmbracoIdentityExtensions/issues/13