We are currently using Titan FTP server build No (3515) on Windows Server 2012. We are now considering migrating from Windows Server 2012 to Windows Server 2019 or a higher version. Additionally, we have planned to update the Titan FTP NextGen server prior to the Windows Server update. However, it seems that we cannot upgrade directly from Titan 3515 to Titan FTP NextGen. First, we need to update Titan 3515 to Titan 3676. After completing the Windows migration, we will need to update from Titan 3676 to Titan NextGen. Our primary objective is to ensure that no data, permissions, or FTP links are lost during this transition.

Could anybody please share your ideas regarding this scenario?