How to Fix 'com.microsoft.sqlserver.jdbc.AuthenticationJNI WARNING: Failed to load sqljdbc_auth.dll' in Java?

Resolving DLL Missing Issue in JDBC

When working with SQL in Java, encountering the error "com.microsoft.sqlserver.jdbc.AuthenticationJNI WARNING: Failed to load the sqljdbc_auth.dll cause : no sqljdbc_auth in java.library.path" indicates a missing DLL file. This usually occurs when using the integratedSecurity=true parameter in the connection string.

Solution:

To resolve this issue, place the sqljdbc_auth.dll in your operating system's System32 folder. Follow these steps:

1. Download the Microsoft SQL JDBC driver from the official website.
2. Unzip the downloaded file and locate the sqljdbc_auth.dll.
3. Copy the DLL file to the System32 folder typically found at C:WindowsSystem32.
4. Run your Java program and the DLL will be automatically loaded, resolving the missing DLL issue.

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