Reset ESXi evaluation license

Reference:

VMware ESXi: How to reset ESXi evaluation license

rm -r /etc/vmware/license.cfg
cp /etc/vmware/.#license.cfg /etc/vmware/license.cfg
/etc/init.d/vpxa restart

Remove An Individual RDS CAL License Pack Using Powershell (User or Device CAL)

Reference:

Open powershell elevated as an administrator
Type the following command to list the RDS Licenses and note the KeyPackID

Get-WmiObject Win32_TSLicenseKeyPack

Run the below command to remove the licenses pack from your RD Server

wmic /namespace:\\root\CIMV2 PATH Win32_TSLicenseKeyPack CALL UninstallLicenseKeyPackWithId KEYPACKID