Login failed for user 'Domain\username'. Reason: Could not find a login matching the name provided. The SQL Server Errorlog will have one of the following messages: If it's present but misspelled, correct that in the application connection string. Verify that the SQL Server login exists and that you've spelled it properly. Login doesn't exist on the SQL Server instance you're trying to connect to. Server is configured for Windows authentication only. Reason: An attempt to login using SQL authentication failed. Note: You can see a message like the following one in the SQL Server Error log for this scenario: Alternatively, you can change your application to use Windows Authentication mode to connect to SQL Server. For more information, see Change server authentication mode. You can review and change the authentication mode for your SQL Server instance on the Security page under Properties for the corresponding instance in SQL Server Management Studio (SSMS). Verify that SQL Server is configured to use SQL Server and Windows Authentication mode. You're trying to use SQL Server Authentication, but the SQL server instance is configured for Windows Authentication mode. For potential causes and suggested resolutions, see: Potential cause If the domain name is specified, the problem is a failing Windows user account login. If the domain name isn't specified, the problem is a failing SQL Server login attempt. Login failed for user 'NT AUTHORITY\ANONYMOUS' LOGON Login failed for user '' or login failed for user '\' Select the exact error that you're experiencing to troubleshoot the issue: The following examples are some of the common login failures. In many cases, error codes include descriptions.
#Microsoft sql server error 18452 password
User logins can fail for many reasons, such as invalid credentials, password expiration, and enabling the wrong authentication mode.
You get this error message when a connection attempt is rejected because of an authentication failure.
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