Problem Occurring While Connecting To Sql Server Using Windows Authentication

By Author: John Smith
Total Articles: 3
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Are you using Windows authentication for logging into SQL server and finding it hard to access it? If yes then this article would be helpful for you. If you are using SQL authentication that needs specific user privileges provided by SQL administrator, then there is absolutely no problem. If you are logging in using Windows authentication, then you might get trapped leading to failed log-in.

If you are willing to connect to an instance of MS SQL Server using Windows Authentication, there might be a chance that the connection gets aborted midway and you are unsuccessful in opening SQL database.
Moreover, if you use the SQL command-line utility to connect to the instance of SQL Server, you might receive the following error message:
Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.

In case you use SQL Query Analyzer to connect to the instance of SQL Server, you may receive the following error message:

Unable to connect to server NameOfTheInstanceOfSQLServer

Server: Msg 18452, Level 16, State 1
[Microsoft] [ODBC SQL Server Driver] [SQL ...
... Server] Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
If we dig into to find out the root cause of this abnormal behavior of SQL Server, then following reasons turns out be the main culprit. Have a look at the conditions that are creating problem in logging using Windows authentication.

The instance of SQL Server is using the TCP/IP server network library for client connections.

A Windows user account that is different from the current Windows logon account is set as the service account for the MS SQL Server service that corresponds to your instance of SQL Server.
One simple reason is that the Windows user account that is used to connect to the instance of SQL Server does not have sufficient permissions on your computer.

For resolving this issue, it's suggested to change the user rights settings on your computer to give sufficient permissions to the Windows user account that is used to connect to the instance of Repair SQL Server. For doing so, go to Start, then Administrative Tools, then Local Security Policy. In the left pane of the Local Security Settings window, expand Local Policies, and click User Rights Assignment. In the right pane, modify the settings of the policies to add the users. Close the Local Security Settings window. Now restart the instance of SQL Server.

This entire hullabaloo may land you up in catastrophic data loss situations leaving SQL .mdf database corrupt. If that is the situation, one can use advanced tool to repair SQL database. Many efficient tools are available to repair SQL database and to extract all lost, damaged objects of SQL database such as triggers, stored procedures, views, rules, defaults, tables and records etc.