How to get dhcp lease expire time with WMI?

Question

Now I'm using Get-DhcpServerv4Lease -ComputerName 'pc' -ScopeId 'id' -AllLeases with $object.leaseExpiryTime to get lease expiry time.

But is it possible to get it with WMI query? Kindly ask you for example.

Answer 1

Use Win32_NetworkAdapterConfiguration, as it does contain DHCPLeaseExpires. As for an example,

gwmi -query "select DHCPLeaseExpires, ipaddress, Description from Win32_NetworkAdapterConfiguration where dhcpleaseexpires is not null"
# Output
Description      : Intel(R) Dual Band Wireless-AC 8265
DHCPLeaseExpires : 20200604032809.000000+180
IPAddress        : {192.168.1.104, fe80::...}

To convert DHCPLeaseExpires into a .Net DateTime, use ManagementDateTimeConverter.ToDateTime(String) from System.Management. A DateTime supports several formatting strings like so,

$wlan = gwmi -query "select ..."
Add-Type -AssemblyName System.Management
$t = [Management.ManagementDateTimeConverter]::ToDateTime($wlan.DHCPLeaseExpires)
$t.GetType()                                                                            
IsPublic IsSerial Name                                     BaseType
-------- -------- ----                                     --------
True     True     DateTime                                 System.ValueType

$t.ToString('u')
2020-06-04 03:28:09Z

$t.ToString('G')                                                                        
4.6.2020 3:28:09