cannot upgrade. get an error message: Product: Quest Recovery Manager for Exchange -- Error 1721. There is a problem with this Windows Installer package. A program required for this install to complete could not be run. Contact your support personnel or package vendor. Action: ElasticSearchServiceUninstallBatchCmd, location: C:\Program Files (x86)\Quest\Recovery Manager for Exchange\, command: C:\Program Files (x86)\Quest\Recovery Manager for Exchange\elasticsearch\bin\esi_service2_uninstall.bat
対策
Uninstall product via Add/Remove programs, then install via MSI and choose the install variables needed for your environment.