Even after providing the correct authorization, the re-authorization message would be displayed due to the Facebook page's visibility. The page must be published on Facebook in the first place to ensure proper authorization. 

To ensure that the connection with the Facebook Page is intact, you would have to re-authorise the page on a periodic basis. So, in Freshdesk, the re-authorisation message would be displayed once in 60 days and you would have to re-authorize the page accordingly. 

Also, when any of the Admins of your Facebook Page are changed, you would have to re-authorise the page from Freshdesk.