问题
My PC name is IBALL1. I get an error
Login Failed for user 'iball1\User1'.(Microsoft SQL server, Error: 18456)
I am trying to log in using Windows authentication.
And in SQL Server Configuration Manager > SQl Server Service > SQL Server Logon As Local System.
In error log text file, at C:\Program Files\Microsoft SQL Server\MSSQL11.MSSQLSERVER\MSSQL\Log
Log says:
Login failed for user 'iball1\User1'. Reason: Could not find a login matching the name provided. [CLIENT: local machine]
回答1:
i have also faced same problem then i have followed this intructions
Try this once other wise will look into other solution
Go to SQL Server Configuration Manager
Start->all program->SQL Server 2008 R2->Configuration Tools->SQL Server Configuration Manager
Explore "SQL Server Network Configuration" and then select "Protocols For MSSQLSERVER".
Check your TCP/IP Protocols in right side pane. If it is disabled then enabled it and Restart the "Sql Server(MSSQLSERVER) service" that available in "SQL Server 2008 R2 services pane".
回答2:
Couple of check points:
1) make sure your your sql express services is up and running with name 'IBALL1' if not try restarting.
2) while connecting give pc name as prefix for server name too .
来源：https://stackoverflow.com/questions/32117041/microsoft-sql-server-error-18456-windows-authentication