Looking for logging into the Failed For User Nt Authority System 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 Failed For User Nt Authority System site. After that you can login as usual with your login credentials.
https://stackoverflow.com/questions/24822076/sql-server-login-error-login-failed-for-user-nt-authority-system
https://stackoverflow.com/questions/6894651/login-failed-login-failed-for-user-nt-authority-system/41766103
https://www.sqlservercentral.com/Forums/182559/Login-failed-for-user-NT-AUTHORITYSYSTEM
https://social.technet.microsoft.com/Forums/en-US/d62c7d31-3393-4898-85bc-fb5856e6db96/sql-server-2012-login-failed-for-user-quotnt-authoritysystemquot%3Fforum%3Dsqlsecurity
https://social.msdn.microsoft.com/Forums/en-US/425ecd7b-816a-4265-ab86-e952ee8bfa5d/login-failed-for-user-nt-authoritysystem%3Fforum%3Dsqlexpress
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/8028aaf4-cd59-4391-9218-dd855de56f95/login-failed-for-user-nt-authoritysystem-in-application-spawned-from-service%3Fforum%3Dsqldataaccess
https://www.experts-exchange.com/questions/22930796/Login-failed-for-user-%27NT-AUTHORITY-SYSTEM%27-in-SQL-logs.html
https://www.youtube.com/watch%3Fv%3D1wADjVteNa8
https://www.aspforums.net/Threads/209412/ASPNet-MVC-Error-Cannot-open-database-Login-failed-for-user-NT-AUTHORITYSYSTEM/Replies/1
http://www.google.com.sa/url?url=http://kb.trbonet.com/public.pl%3FAction%3DPublicFAQZoom%3BItemID%3D72
https://help.octopus.com/t/windows-servier-start-login-failed-for-user-nt-authority-system/3595
https://www.codeproject.com/Questions/745724/Login-failed-for-user-NT-AUTHORITY-ANONYMOUS-LOGON
https://archive.sap.com/discussions/thread/1052484