To upgrade Parallels Mac Management for Microsoft SCCM to a newer version, you need to uninstall the current version and then install a new one.
To run the uninstaller, go to Control Panel > Programs > Uninstall a program and uninstall the Parallels Mac Management for Microsoft SCCM program.
NOTE: If Parallels Mac Management components are installed on different servers, you need to uninstall each component individually.
When done, install the new version of Parallels Mac Management for Microsoft SCCM. Please note that after upgrading Parallels Mac Management you need to recreate NetBoot and NetRestore images and upgrade the Parallels Mac Client on each managed Mac.
Starting from version 4.5 there is an option to upgrade Parallels Mac Management Client automatically:
For additional information please refer to Administrator's Guide p.70 for further instructions.