Allow PPT & PPTX file upload for Ultimate Member

um-allowed-type.php

/**
 * Allow PPT & PPTX file upload for Ultimate Member
 * @link https://wordpress.org/plugins/ultimate-member/
 */
add_filter( 'um_allowed_file_types', 'matt_allowed_new_file_types', 10, 1 );

function matt_allowed_new_file_types( $types ) {
    $types = array(
		'pdf'   => 'PDF',
		'txt'   => 'Text',
		'csv'   => 'CSV',
		'doc'   => 'DOC',
		'docx'  => 'DOCX',
		'odt'   => 'ODT',
		'ods'   => 'ODS',
		'xls'   => 'XLS',
		'xlsx'  => 'XLSX',
		'zip'   => 'ZIP',
		'rar'   => 'RAR',
		'mp3'   => 'MP3',
		'jpg'   => 'JPG',
		'jpeg'  => 'JPEG',
		'png'   => 'PNG',
		'gif'   => 'GIF',
		'eps'   => 'EPS',
		'psd'   => 'PSD',
		'tif'   => 'TIF',
		'tiff'  => 'TIFF',
		'ppt'  	=> 'PPT',
		'pptx'  => 'PPTX',
	);
	return $types;
}