I am starting to see messages stating "computers not in contact" and "computers deleted".  I'd like to learn the behavior of the system if an agent doesn't check in on a frequent basis.

For example, we have spare laptops that have the agent on them but the device isn't on everyday.  It appears the device gets dropped after a certain time period, can that be adjusted?  What happens if the device is dropped but is then turned on for the agent to check in, does it repopulate the database?