What if I'm receiving Error 18456 when connecting from an application instead of SSMS?

By: USER2715
28 Agustus 2025 Support 5 minutes
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Question

Grade: Education Subject: Support
What if I'm receiving Error 18456 when connecting from an application instead of SSMS?
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Best Answer
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If the error occurs from an application, verify the connection string uses the correct server name, database name, username, and password. Ensure the application is configured to use the correct authentication mode (Windows or SQL Server). Also, check if the application pool identity has the necessary permissions to access SQL Server.
Answered on 28 Agustus 2025

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