Finally, Facebook has given us the necessary API permissions to reply to messages > 24h old. All our tests work fine.
May 18, 22:24 CEST
Good news! Facebook approved our application, and we're waiting for the actual function to be available. This means that during next week, you'll be able to handle Messenger tickets which is older than 24 hours. We'll notify you when the function is available.
May 15, 09:56 CEST
Facebook has applied a new platform policy to prevent bot's spamming your users. For a brief period of time, you'll have to answer your Facebook Messenger clients within 24 hours, or use the permalink to reply directly on Facebook. Check out our faq (no) for more information http://bit.ly/39CU6xz
Mar 10, 08:18 CET