I know my question is very similar to this one; SQL database login for 'Config' on instance '' failed. Additional error information from SQL Server is included below
However in my case the user is NT AUTHORITY\ANONYMOUS LOGON.
Complete Error Message:
SQL database login for 'SharePoint2016_Intranet_ConfigDB' on instance 'SQLServer_1' failed. Additional error information from SQL Server is included below. Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'.
I am new to SharePoint Administration. And thus don't know what it will mean giving permission to Anonymous Logon.