The Microsoft Dynamics AX application files contain business logic and should be backed up on a regular basis. By default, the application files are installed in the Program Files\Microsoft Dynamics AX\50\Application\Appl folder and subfolders. Refer to your operating system documentation for details about how to choose and implement a file backup and restore strategy.
How you deploy Microsoft Dynamics AX will affect your file backup and restore strategy.
If you use a staging server, application files are installed on the staging server and later deployed to the application file server. In this scenario, routinely back up the files on the staging server.
If you install the application files directly on the application file server, routinely back up the files on the application file server.
If the files are in use or are locked by the Application Object Server (AOS), you may not be able to back up the files. In that case, stop the AOS and then back up the files.