Last updated: 2021-06-18
Source: https://support.freshdesk.com/support/solutions/articles/221711-facebook-real-time-messaging
We've updated our APIs to bring in messages from your Facebook pages in real-time. This means that messages will now appear in your helpdesk instantly, and you can respond to them even faster, just as you would in Facebook Messenger.
Facebook pages added after September 8th, 2016 will have this feature enabled automatically. For pages added prior to this date, please follow the instructions below:
(NOTE: Please do not delete and then add your Facebook Pages again, as this will disable the option to reply to existing posts in your helpdesk from these Pages.)
Facebook real-time messaging will now be enabled for all the pages that you've reauthorized. Once enabled, the first message from every user on any of your Pages will be converted into a new ticket. All subsequent replies will get threaded automatically, based on your threading interval.
Note: For users who currently have real-time messaging enabled in their accounts, replies sent from Freshdesk need to be less than 320 characters. This is a limitation with the Facebook API. If you would like to send out longer replies to your customers through direct messages, we recommend you split it across multiple replies instead.