[mssms] Reinstall Required Software

[s kissel]

Hello - What is the recommended way to reinstall a required application? If 
deployed normally, and the software is installed, the Software Center does not 
give the ability to reinstall (or uninstall) required software via the 
interface. Thus, if someone uninstalls the software from Programs and Features, 
how can the reinstall occur, as SCCM still thinks the software is installed?
Regards,-S