Looking for logging into the Sql Valid But Server Access Failure 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 Sql Valid But Server Access Failure site. After that you can login as usual with your login credentials.
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/2733ee3e-b2a8-4397-b3e5-4f856852b450/error-18456-severity-14-state-11-valid-login-but-server-access-failure?forum=sqlsecurity
https://support.microsoft.com/en-gb/help/555332/login-failed-for-user-error-message-when-you-log-on-to-sql-server
http://www.insidesql.org/blogs/cmu/sql_server/error-18456-severity-14-state-11
https://stackoverflow.com/questions/20923015/login-to-microsoft-sql-server-error-18456
https://www.sqlservercentral.com/Forums/Topic1169483-1550-1.aspx
https://serverfault.com/questions/2218/sql-server-issue-login-failed-for-user-username
https://theitbros.com/microsoft-sql-server-error-18456/
http://www.data-recovery-solutions.com/blog/login-failed-for-user-microsoft-sql-server-error-18456/
https://dba.stackexchange.com/questions/5971/sql-server-2008-r2-error-18456-state-12-nothing-i-find-helps-me
https://www.quora.com/What-does-Microsoft-SQL-Server-Error-18456-mean
http://sql-articles.com/articles/troubleshooting/troubleshooting-login-failed-error-18456/
http://www.oostdam.info/index.php/knowledge-faqs/17-sql-errors-and-how-to/138-sql-error-18456-login-failed
https://www.sqlteam.com/forums/topic.asp?topic_id=186313