Symantec Management Platform (Notification Server)

I have looked for an answer to this, but have yet to come up with a solution.  I will give you the scenario. 

In our organization, it is required that computers are rebuilt on a regular basis(hdd formatted and OS re-installed, along with software).  The options I have seen for re-installing the Agent are run the task to uninstall or wait till it is purged.  Per our company policy, purge is to be set at 3 months, and running the uninstall task sometimes isnt feasible due to hardware failure or some other circumstances where the computer needs to be removed from the network immediately.  What are some other options that I have?

You could just reimage and then install the SMA, as SMP 7.x will match certain unique data with the existing computer resource and then give the reimaged machine that guid instead of a new one.

If you want a new guid, then you will most likely have to delete the resource.