About this task
Rolling back the system restores the system to the pre-upgrade state by reinstalling the previous release of Avaya MS. You might need to roll back the system if:
Functionality in the new version is not compatible with other components of your solution.
The upgrade process encountered an error and did not complete successfully.
An unsupported upgrade path ended the upgrade process.
The upgrade tool could not read the backup data file.
You stopped the upgrade during the procedure.