Configure Windows Server based DHCP database cleanup interval & lease grace period

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My Windows Server based DHCP server related settings:

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Here, Leaseextension is set to ten minutes, which means that the default 4-hour grace period is shortened to 10 minutes. DatabaseCleanupInterval defaults to minutes, that is, the DHCP database cleanup is executed every hour by default.

This article from "Sukhoi" blog, declined reprint!