Why in SBS 2008 after a short period DNS stopped and needed a reboot?

For a permanent work around, the MaxCacheTTL value needs to be changed to a value larger than the TLD TTL (Default value is 1 day, maximum value is 30 days). On SBS2008 there is no negative impact since this is the TTL for the cache of Resource Records. This is just the maximum value that it will be stored on DNS server. If the actual TTL is shorter, the