For use with The Events Calendar PRO. Just a quick function to remove the 'X-WR-CALNAME' header in the ical .ics file so it imports into Outlook. Place in theme's functions.php file, but it will affect every generated ics file.

tribe-events-ical-outlook-modify.php

<?php

add_filter( 'tribe_ical_properties', 'tribe_ical_outlook_modify', 10, 2 );

function tribe_ical_outlook_modify( $content ) {
  $properties = preg_split ( '/$\R?^/m', $content );
	$searchValue = "X-WR-CALNAME";
	$fl_array = preg_grep('/^' . "$searchValue" . '.*/', $properties);
	$key = array_values($fl_array);
	$keynum = key($fl_array);
	unset($properties[$keynum]);
	$content = implode( "\n", $properties );
	return $content;
}