![SQL SERVER - Fix : Error : 1326 Cannot connect to Database Server Error: 40 - Could not open a connection to SQL Server - SQL Authority with Pinal Dave SQL SERVER - Fix : Error : 1326 Cannot connect to Database Server Error: 40 - Could not open a connection to SQL Server - SQL Authority with Pinal Dave](https://blog.sqlauthority.com/i/b/firewall.gif)
SQL SERVER - Fix : Error : 1326 Cannot connect to Database Server Error: 40 - Could not open a connection to SQL Server - SQL Authority with Pinal Dave
![SQL SERVER - Cannot open backup device. Operating system error 1326 (Logon failure: unknown user name or bad password.) - SQL Authority with Pinal Dave SQL SERVER - Cannot open backup device. Operating system error 1326 (Logon failure: unknown user name or bad password.) - SQL Authority with Pinal Dave](https://blog.sqlauthority.com/wp-content/uploads/2017/02/bad-password-1-800x201.jpg)
SQL SERVER - Cannot open backup device. Operating system error 1326 (Logon failure: unknown user name or bad password.) - SQL Authority with Pinal Dave
![An error occurred during the execution of xp_cmdshell. A call to 'LogonUserW' failed with error code: '1326'. – Technical Guided An error occurred during the execution of xp_cmdshell. A call to 'LogonUserW' failed with error code: '1326'. – Technical Guided](https://blog.svarinos.eu/wp-content/uploads/2020/10/sql-database-server-isolated-flat-web-mobile-icon-vector-28995487.jpg)
An error occurred during the execution of xp_cmdshell. A call to 'LogonUserW' failed with error code: '1326'. – Technical Guided
![SQL SERVER - Fix : Error : 1326 Cannot connect to Database Server Error: 40 - Could not open a connection to SQL Server - SQL Authority with Pinal Dave SQL SERVER - Fix : Error : 1326 Cannot connect to Database Server Error: 40 - Could not open a connection to SQL Server - SQL Authority with Pinal Dave](https://blog.sqlauthority.com/i/b/firewall4.gif)
SQL SERVER - Fix : Error : 1326 Cannot connect to Database Server Error: 40 - Could not open a connection to SQL Server - SQL Authority with Pinal Dave
![SQL SERVER - Fix : Error : 1326 Cannot connect to Database Server Error: 40 - Could not open a connection to SQL Server - SQL Authority with Pinal Dave SQL SERVER - Fix : Error : 1326 Cannot connect to Database Server Error: 40 - Could not open a connection to SQL Server - SQL Authority with Pinal Dave](https://blog.sqlauthority.com/i/b/firewall3.gif)
SQL SERVER - Fix : Error : 1326 Cannot connect to Database Server Error: 40 - Could not open a connection to SQL Server - SQL Authority with Pinal Dave
![A network-related or instance-specific error occurred while establishing a connection to SQL Server. - Dream DotNet A network-related or instance-specific error occurred while establishing a connection to SQL Server. - Dream DotNet](https://1.bp.blogspot.com/-4lF7w_zIM64/Vwy5Gtjb7pI/AAAAAAAAAJU/WI8lHrUOJj4UpoKgQ12CuVNXQSGgiYcfQCLcB/s1600/Step1.png)
A network-related or instance-specific error occurred while establishing a connection to SQL Server. - Dream DotNet
![SQL SERVER - FIX : ERROR : (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: ) - SQL Authority with Pinal Dave SQL SERVER - FIX : ERROR : (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: ) - SQL Authority with Pinal Dave](https://blog.sqlauthority.com/i/b/error40/e40_10.jpg)
SQL SERVER - FIX : ERROR : (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: ) - SQL Authority with Pinal Dave
![Cannot Create Backup Device - SQL Server 2008 R2, Error 1326 (permissions look ok) - Database Administrators Stack Exchange Cannot Create Backup Device - SQL Server 2008 R2, Error 1326 (permissions look ok) - Database Administrators Stack Exchange](https://i.stack.imgur.com/wym3P.png)