Right Click on Instance - Go to properties - Click on security – change to “SQL Server and Windows Authentication mode” – Restart the InstanceĪfter SQL Server instance restart you should be able to connect. I've seen a number of search results that refer to an issue with the sa account and I understand that. Solution: Modify the Server is to use both SQL Server and Windows Authentication mode. The event had my domain name and computer name in there. Ĭause: The server is configured for Windows authentication only and not able to connect using SQL Server Authentication. Server is configured for Windows authentication only. Reason: An attempt to login using SQL authentication failed. When you selected proper account (With sufficient permission), return to 'log on. Now find your account in the below table and select it. Click 'Browse' button, then Click 'Advanced' button. On the 'log on ' tab ,choose 'this account'. If you are trying to connect using Windows Authentication, verify that you are properly logged into the correct domain. Right Click 'SQL Server Agent' and choose properties. verify that SQL Server is configured in Mixed Authentication Mode and verify that SQL Server login exists and that you have spelled it properly. To fix the problem, try to connect again to your Organization network and create the user while you are connected and then you can get disconnected and will work. 23:06:46.80 Logon Login failed for user TestDB. (Microsoft SQL Server, Error: 18456)in windows 2008 Archived Forums >. Using useradmin on a disconnected environment allows you to create other users using SQL Server authentication, but as soon as you try to login you get. User is able to connect using Windows credentials, but not able to connect using “SQL Server Authentication” using SQL Server Management Studio and ODBC.
Anyway, everything is working again but I have still one problem. To figure out the exact reason, this error number 18456 with its STATE number is logged into the SQL server error log file, if SQL server was allowed or configured to capture the failed logins. I asked to the sys admins if there where any change and they told me they had to rename the administrator account :(. This message simply denotes that the client call was able to reach the SQL server and then an ACCESS was denied to the particular login for a reason. Reason: Failed to open the database configured in the login object while revalidating the login on the connection. After my holiday I came back and I found some errors in my SQL Server 2008 R2. Login failed for user “TestUser”.(Microsoft SQL Server, Error: 18456) This is reported as state 16 prior to SQL Server 2008.
Continuing with user troubleshooting, right-click the user and choose Properties, then click the General page. Users may encounter SQL Server login failures with below error message. In this example, the SQL user ‘sa’ failed to log in because there was no permission to log in.
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