Error 233 occurred while SQL Server was logged on

A 233 error occurred with a colleague using SQL Server. 233 error occurs after you connect 1 databases using Microsoft SQL Server Management Studio and disconnect again

Viewing Windows log discovery is caused by a limit of maximum connections to ' 3 '.

Reference Blog: Resolution of error 233 when SQL Server logs on

Reference: Unable to connect because ' * ' user connections have reached maximum value

CMD command:

Sqlcmd-a-D Master

To modify a command:

EXEC sp_configure ' show advanced option ', ' 1-goreconfigure with OVERRIDE

Maximum number of connections is 100,0 No limit (maximum number of connections is 32767)

The graphical interface is as follows:

Error 233 occurred while SQL Server was logged on