Open up SQL Server configuration manager and right click the instance and restart. It will then prompt you to restart your instance. Select the item that says: SQL Server and Windows Authentication mode. The most secure method is windows authentication, but you have an old app that still needs SQL Server authentication. Look to see what Server authentication is set to. Right click your instance and choose properties. You know you created the account correctly, but you get this error message when trying to connect.įirst thing you should do is check to make sure your instance is set correctly. Below I am going to show you one way that fixes the issue. So you create one, and then you try to login using the credentials and you get the dreaded: Login failed for user Error: 18456 error. Most importantly verify that the user has access granted in the 'Status' Tab.Many times you have applications that need to have a SQL Server login instead of one that uses Windows authentication.

Make sure that proper 'Mapping' is correct for the database the user needs to have access to on the 'User Mapping' Tab Make sure that proper privileges are set on the 'Server Roles' Tab Make sure that the Password is set on the 'General' Tab

Right-click on the user name and click on 'Properties'.

Find the user name that has problems logging in,.

Navigate to the ' Security Object' in ' Object Explorer' Panel and expand the ' Logins' folder.

If the above did not work for you? continual. : If you happen to make any Server changes, it is advisable to restart the SQL Server Services, Consult with your team if this is a production server. Navigate to 'Security' and check 'SQL Server and Windows Authentication mode' this will allow Server Authentication. Go to 'Server Instance' right on top where your SQL Data Engine shows, right-click

The first thing you want to enable is the 'Server Authentication' mode, allow both SQL Server and Windows Authentication mode.

Log in to SQL Server with the user name that has access to the Server Instance, normally this will be your Windows Authentication Login.

(Microsoft SQL, Error: 18456), see the solution below: Problem: When you are trying to login into SQL Server with a new User Name and you see this error: Login failed for user.

Login failed for user sql error 18456