Unable to login On-Prem SQL server

To troubleshoot the inability to log in to your On-Prem SQL Server, consider the following steps:

1. Check User Credentials: Ensure that you are using the correct username and password. If the login fails, you might receive an error message indicating that the login failed for the user.
2. Login Status: Verify if the user account is disabled. You can check this by running the following SQL query in the master database:

      SELECT name, is_disabled FROM sys.sql_logins;
   

   If the user is disabled, you can enable it with:

      ALTER LOGIN <User name> ENABLE;
   

3. Permissions: Ensure that the user has the necessary permissions to access the SQL Server and the specific database. You may need to create a new SQL login or grant permissions if they are missing.
4. Network Issues: Check for any network-related issues that might prevent the connection. Ensure that the SQL Server instance is accessible over the network and that firewalls are not blocking the connection.
5. SQL Server Configuration: Make sure that the SQL Server is configured to allow remote connections. You can check this in SQL Server Management Studio (SSMS) under the server properties.
6. Review Logs: Check the SQL Server logs for any errors or warnings that could provide more context about the connection issue.

If the problem persists after these checks, you may need to consult with your service administrator or further investigate the specific error messages you are encountering.