yes, but it depends how you have it configured
Automated options for this are:
Run Every X Seconds and it shouldn't be below 3600
Run Once On Server Startup is another, and is not needed if above is configured
abandonedbases.attack permission will allow players to hunt for bases and if the lifetime has expired the base will convert when they attack it, otherwise it will show how long is left before the base is abandoned
Conversions Before Destroying Base is exactly as the name implies. the amount of times the base will be converted into an abandoned base before it gets destroyed when the despawn timer expires.