Category: SQL Server Error

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Understanding and Resolving SQL Server Error 18456: Login Failed for User SQL Server Error 18456 is a common login error that can cause headaches for database administrators and developers alike. The error message typically appears as: “Login failed for user ‘<user_name>’. Reason: <reason>. Error: 18456.” This error occurs when a user attempts to connect to SQL Server and the authentication process fails. In this post, we’ll explore the common causes of this error, how to troubleshoot it, and best practices …

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Understanding and Resolving SQL Server Error 18456 If you’ve been working with SQL Server for a while, chances are you’ve encountered the dreaded “Login failed for user” error, known as Error 18456. This error is one of the most common authentication issues in SQL Server, and it can be frustrating because it doesn’t always give a clear explanation of the root cause. In this blog post, I’ll dive into what SQL Server Error 18456 is, why it occurs, and how …

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Introduction With the release of SQL Server 2019 CU 27, some users have encountered a bug that causes the error log to be flooded with the following warning message: source This issue results from an incorrect code change during the build process of CU 27. If you experience this issue and prefer not to uninstall the CU, there are several steps you can take to resolve it. Understanding the Issue The warning message indicates that an asynchronous API call is …

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