Thanks, As per SAS documentation , its mentioned not required any backup if you upgrading from M3 to M4. Steps to Complete When Upgrading to SAS 9.4_M2, SAS 9.4_M3, or SAS 9.4_M4 If you are applying the second, third, or fourth maintenance release for SAS 9.4, the configuration script automatically configures the Deployment Backup and Recovery tool. After you update your software, complete these steps: Verify that the URL in the ProxyPass entry for SASDeploymentBackup contains the host name of the main machine for the middle tier. Restart the SAS Web Server.
... View more