https://community.qlik.com/t5/Connectivity-Data-Prep/User-error-when-connecting-to-SQL-Server/m-p/1637356#M4503 <P>Hi,</P><P>In the error message I can see error code 18456 returned by SQL server, which usually indicates incorrect username/ password being used in the connection. See&nbsp;<A href="https://docs.microsoft.com/en-us/sql/relational-databases/errors-events/mssqlserver-18456-database-engine-error?view=sql-server-ver15" target="_blank">https://docs.microsoft.com/en-us/sql/relational-databases/errors-events/mssqlserver-18456-database-engine-error?view=sql-server-ver15</A></P><P>If the database server requires SQL Server Authentication (username-password), make sure you can log in with this credentials on another SQL Server client (for example SQL Server Management Studio)</P><P>If Windows authentication is being used, make sure the service account running Qlik Sense Engine service has access to the database.</P><P>BR,</P><P>Vu Nguyen</P><P>&nbsp;</P> Fri, 18 Oct 2019 18:50:01 GMT vunguyenq89 2019-10-18T18:50:01Z https://community.qlik.com/t5/Connectivity-Data-Prep/User-error-when-connecting-to-SQL-Server/m-p/1637133#M4501 <P>Hi everyone,</P><P>Could anyone help me? I am trying to connect to SQL Server through its connector. I enter everything but when I click on "Create" attached error shows up (loggin error for the SQL Server user).</P><P>Is it due to SQL Server user or password?</P><P>Thank you very much in advance.</P> Tue, 28 Dec 2021 20:10:18 GMT https://community.qlik.com/t5/Connectivity-Data-Prep/User-error-when-connecting-to-SQL-Server/m-p/1637133#M4501 mtabernad 2021-12-28T20:10:18Z https://community.qlik.com/t5/Connectivity-Data-Prep/User-error-when-connecting-to-SQL-Server/m-p/1637356#M4503 <P>Hi,</P><P>In the error message I can see error code 18456 returned by SQL server, which usually indicates incorrect username/ password being used in the connection. See&nbsp;<A href="https://docs.microsoft.com/en-us/sql/relational-databases/errors-events/mssqlserver-18456-database-engine-error?view=sql-server-ver15" target="_blank">https://docs.microsoft.com/en-us/sql/relational-databases/errors-events/mssqlserver-18456-database-engine-error?view=sql-server-ver15</A></P><P>If the database server requires SQL Server Authentication (username-password), make sure you can log in with this credentials on another SQL Server client (for example SQL Server Management Studio)</P><P>If Windows authentication is being used, make sure the service account running Qlik Sense Engine service has access to the database.</P><P>BR,</P><P>Vu Nguyen</P><P>&nbsp;</P> Fri, 18 Oct 2019 18:50:01 GMT https://community.qlik.com/t5/Connectivity-Data-Prep/User-error-when-connecting-to-SQL-Server/m-p/1637356#M4503 vunguyenq89 2019-10-18T18:50:01Z