[fix]-Microsoft SQL Server Error : 18456
Scenario :
This issue raises when the server come across an error that stops a login from succeeding, the client will exhibit the below error message :
Msg 18456, Level 14, State 1, Server <server name>, Line 1
Login failed for user ‘<user name>’
Fix 1 :
The administrator user must examine the server’s error log. A sample entry can be like:
2006-02-27 00:02:00.34 Logon Error: 18456, Severity: 14, State: 8.
2006-02-27 00:02:00.34 Logon Login failed for user ‘<user name>’. [CLIENT: <ip address>]
The error message type can be identified with the ‘State’ value. Here the State value 8 indicates that the authentication is unsuccessful due to improper password. Error states and descriptions are given below:
ERROR STATE
| ERROR DESCRIPTION
|
2 and 5
| Invalid userid
|
6
| Attempt to use a Windows login name with SQL Authentication
|
7
| Login disabled and password mismatch
|
8
| Password mismatch
|
9
| Invalid password
|
| 11 and 12 | Valid login but server access failure
|
13
| SQL Server service paused
|
18
| Change password required
|
Fix 2 :
1. Open SQL Server Management Studio with 'Run as Administrator' option.
2. When connecting with "SQL Server Authentication" modify the authentication as follows:
- Right click server and click properties.
- Go to security page.
- In Server authentication, select the SQL Server and Windows Authentication mode radio button. (Select both mode).
- Click OK.
- Restart your server.
Fixes are applicable to the following versions of SQL Server:
- SQL Server 7.0 OLAP Tools
- SQL Server 2000 64-bit Edition
Related Error Tags :
- How to Fix Login Failed for User (Microsoft SQL Server, Error: 18456
- Understanding "login failed" (Error 18456) error messages in SQL
- Microsoft SQL Server Error 18456 Login Failed for User
- Unable to Connect to SQL Server Due to Error: 18456, Severity: 14
- How to Fix Login Failed to SQL Server - Error 18456/18452/4064/4062
