Distributed Power Management (DPM) detected better candidates to power off.

HA needs extra capacity for failover.

Load is not low enough to trigger the host to power off.

DPM projects that the load will increase.

DPM is not enabled for the host.

DPM threshold is set too high.

While DPM is enabled for the host, no suitable power-on mechanism is present for the host.

DRS cannot evacuate the host.

DRS migration threshold is at the highest setting and only performs mandatory moves.