Refer to the exhibit.

The most likely action to resolve the problem is to configure the ESXi host to use a remote NTP server. The time window requires the ESXi host to be synchronized to a time source in order to properly calculate the time window, and the error is likely due to the ESXi host not being synchronized. Configuring the ESXi host to use a remote NTP server should ensure that the host is properly synchronized, and allow the time window to be configured correctly. References: [1] https://docs.vmware.com/en/VMware-NSX-T/3.0/vmware-nsx-t-30-administration-guide/GUID-DD7F38A3-3D3B-47F1-92D7-9A4D4F3C44E1.html  [2] https://www.vmware.com/support/vsphere/doc/vsphere-esxi-vcenter-server-601-configuration-maximums.html