Siarom I think this feature will not implemented since wee have the option to build Dhcp only with static hosts "Allow only this" is much better and easy than deny this and this every day
you have a range / 24 ips assignment, however the dhcp server has no more available ips and the lease time is set for 7 or 30 days.
you no longer have free ips (Astaro also does not report the total / used / free in dhcp). and you need to release new ips for new users ... this must be done manually? via ssh and dhcp changing the file manually? erasing the ips that are "garbage" ...
I think a button to delete an ip assigned by dhcp should be easy to implement and many users would appreciate for this feature.
I'm with Barry suggestion In all environments I didn't see an DHCP lease longer than 3 days and if even is longer, the same mac will pick up the same ip if the host request for new ip after 5 mins
While I agree we should allow you to expire a lease in WebAdmin (we will implement that, but maybe not in 9.1), your lease times shouldn't be a week. 1-3 days is normal...