Hi @sufian hamdan ,
Did you mean SQL server configuration manager or SQL server management studio?
SQL Server Configuration Manager is a tool to manage the services associated with SQL Server, to configure the network protocols used by SQL Server, and to manage the network connectivity configuration from SQL Server client computers. SQL Server Configuration Manager is installed with your SQL Server installation. Refer to MS document SQL Server Configuration Manager. We can find the SQL server instances that you installed in your server as below screenshot .
SQL Server Management Studio (SSMS) is an integrated environment for managing any SQL infrastructure. SSMS provides tools to configure, monitor, and administer instances of SQL Server and databases. We need to download and install SSMS separately since SQL server 2016. Refer to MS document Download SQL Server Management Studio (SSMS). Suggest you using the latest version SSMS 18.9.2.
For connecting to SQL server instance, please follow below steps.
Choose the SQL server instance that you want to connect.
Choose the SQL server authentication, Windows authentication or SQL server authentication.
By the way, if the SQL server connection failed, please follow below MS document to resolve the issue.
Troubleshoot connecting to the SQL Server Database Engine
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