Dec 5, 2007 · A connection attempt is rejected due to a failure with a bad password or username in SQL Server. See an explanation of the error and possible resolutions.

Jul 8, 2016 · When I get the non-descriptive 'Microsoft SQL Server Error: 18456', here's what I do to determine the actual cause of the issue. On the computer that runs the SQL server, open …

Dec 18, 2023 · You may encounter the SQL Server Error 18456 if the server could not authenticate the connection and this can be caused by the non-availability of the administrator …

Nov 23, 2025 · Understand and fix SQL Server Error 18456. See what each State means, how to check the error log in SSMS, and step-by-step solutions for common login failures.

Jun 18, 2025 · Working with thousands of instances of Microsoft SQL Server, I often encounter users having issues. A common error is 18456 which indicates a login failure. Some common …

Feb 16, 2025 · Troubleshoot SQL Server Error 18456: Discover common causes and effective solutions for resolving this common authentication issue.

Apr 21, 2025 · Learn how to fix SQL Error 18456 and log back into your database with the help of a professional tool to resolve SQL login failed 18456

By default login failed error message is nothing but a client user connection has been refused by the server due to mismatch of login credentials. First task you might check is to see whether …

May 7, 2025 · Problem with the user account's access to the network login - SQL Server This article provides the resolution steps when users have insufficient permissions to log in to a …