You can save the Tabulate output to a text file, which you can then bring into Excel.  Here is a simple illustration of saving the output to text
Names Default To Here( 1 );
dt = Open( "$SAMPLE_DATA/big class.jmp" );
tab = tb = Tabulate(
	Show Control Panel( 0 ),
	Add Table( Row Table( Grouping Columns( :age, :name ) ) ),
	Display Column Width( Row Label( "name" ), 70 )
);
Report( tb )[tabulatebox( 1 )] << save text( "$TEMP/tab.txt" );
					
				
			
			
				
	Jim