Do it this way, bro:

	\Mail::send('yourMail/file', $data, function($message) use($data)
	{
		$filename = "invite.ics";
		$meeting_duration = (3600 * 2); // 2 hours
		$meetingstamp = strtotime( $data['start_date'] . " UTC");
		$dtstart = gmdate('Ymd\THis\Z', $meetingstamp);
		$dtend =  gmdate('Ymd\THis\Z', $meetingstamp + $meeting_duration);
		$todaystamp = gmdate('Ymd\THis\Z');
		$uid = date('Ymd').'T'.date('His').'-'.rand().'@yourdomain.com';
		$description = strip_tags($data['texto']);
		$location = "Telefone ou vídeo conferência";
		$titulo_invite = "Your meeting title";
		$organizer = "CN=Organizer name:[email protected]";
		
		// ICS
		$mail[0]  = "BEGIN:VCALENDAR";
		$mail[1] = "PRODID:-//Google Inc//Google Calendar 70.9054//EN";
		$mail[2] = "VERSION:2.0";
		$mail[3] = "CALSCALE:GREGORIAN";
		$mail[4] = "METHOD:REQUEST";
		$mail[5] = "BEGIN:VEVENT";
		$mail[6] = "DTSTART;TZID=America/Sao_Paulo:" . $dtstart;
		$mail[7] = "DTEND;TZID=America/Sao_Paulo:" . $dtend;
		$mail[8] = "DTSTAMP;TZID=America/Sao_Paulo:" . $todaystamp;
		$mail[9] = "UID:" . $uid;
		$mail[10] = "ORGANIZER;" . $organizer;
		$mail[11] = "CREATED:" . $todaystamp;
		$mail[12] = "DESCRIPTION:" . $description;
		$mail[13] = "LAST-MODIFIED:" . $todaystamp;
		$mail[14] = "LOCATION:" . $location;
		$mail[15] = "SEQUENCE:0";
		$mail[16] = "STATUS:CONFIRMED";
		$mail[17] = "SUMMARY:" . $titulo_invite;
		$mail[18] = "TRANSP:OPAQUE";
		$mail[19] = "END:VEVENT";
		$mail[20] = "END:VCALENDAR";
		
		$mail = implode("\r\n", $mail);
		header("text/calendar");
		file_put_contents($filename, $mail);
		
		$message->subject($data['titulo']);
		$message->to($data['destinatario']);
	    $message->attach($filename, array('mime' => "text/calendar"));
	});

Regards,

David

@davidtoledo

Thank you for your snippet.

@davidtoledo

Thanks for your snippet. It's working in gmail but not working in outlook. I am getting 'The .ICS attachment can't be viewed because the format is not supported.' Please let me know where the problem is?

@muralibobby35 and @davidtoledo

That'e exactly what I am doing through "t's working in gmail but not working in outlook", did you find the fix of this issue?

Did you guys find a way to make this work on outlook? I still get the .ics as an attachment instead of the buttons to accept or decline.. Please help