On the Veeam ONE Server machine, change the collection interval in the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Veeam\Veeam ONE Monitor\Service
Create a new DWORD value with the following properties:
Name = HostRuntimeInfoUpdateInterval
Base = Decimal
Value = XXX, where XXX is the required timeout in seconds.
Once you change the value, restart Veeam ONE Monitor Service.
Perform the necessary tests to make sure you are getting alerts in a timely manner in your environment.