MOSS 2007 : psconfig.exe

Use and Need of psconfig.exe in MOSS 2007

In SharePoint Products and Technologies, you can use the psconfig.exe command-line tool as an alternate interface to perform several operations that control how the SharePoint Products and Technologies are configured. You must be a member of the Administrators group on the local computer to perform these operations.

Here is a scenario I found where one would use psconfig instead of the MOSS graphical interface.

For example, if you want to use a SQL server installed on different domain than SharePoint, without using domains trust relationship, you have to connect to the SQL instance using SQL authentication. When creating, or connecting a server to a farm, the only way to use SQL authentication is to use psconfig.exe (located at 12\bin directory) tool.

More information on psconfig.exe:http://technet.microsoft.com/en-us/library/cc263093.aspx.

You can also refer to :http://blogs.msdn.com/yvan_duhamel/archive/2008/11/24/configuring-your-sharepoint-farm-through-psconfig-command-line-tool.aspx