Help For Error: 602, Severity: 21, State: 4.Error: 18456, Severity: 14, State: 11 Valid Login But Server Access Failure.Service Startup Failed On SQL Logon, Error: 18456, Severity: 14, State: 16.Error: 18456, Severity: 14, State: 16 Login Failed For User 'NT AUTHORITYSYSTEM'.Login Failed For User 'username', Error: 18456, Severity: 14, State: 8.SQL Server 2005 X64: Intermittent Error: 18456, Severity: 14, State: 10.Driving Me Nuts: Error: 18456, Severity: 14, State: 16.Microsoft SQL Server Error 18456 Severity 14 State 1.Error: 18456 Severity: 14, State: 11 On DomainGroup.Logon Error: 18456, Severity: 14, State: 8 - NEED HELP!!!!.MS SQL Server Error 18456 Severity 14 State 8.Error: 18456, Severity: 14, State: 11 When Logging In.Error 18456 Severity: 14 State 11 Problem.This error did not start happening until I re-installed SQL Server 2005 (I had another issue that has been resolved).

I can verify that the user 'xxx' does exist and has the proper password in Active Directory. When I try to make a connection to my SQL Database I get the following error in the ERRORLOG file for SQL: If you are trying to connect using Windows Authentication, verify that you are properly logged into the correct domain.Error: 18456, Severity: 14, State: 5 Apr 28, 2008 If you are trying to connect using SQL Server Authentication, verify that the SQL Server login exists.

If you are trying to connect using SQL Server Authentication, verify that SQL Server is configured in Mixed Authentication Mode. Similar problems can cause the less-specific error 18456. This could be because the Windows login is from an untrusted domain. An unrecognized Windows principal means that the login cannot be verified by Windows.

The login may use Windows Authentication but the login is an unrecognized Windows principal. You are trying to connect using SQL Server Authentication but the login used does not exist on SQL Server. The login may be a SQL Server login but the server only accepts Windows Authentication. The user attempted to login with credentials that cannot be validated. The login is a SQL Server login and cannot be used with Windows Authentication.%.*ls Applies to: SQL Server (all supported versions) Details Attribute

Ms sql error 18456