Receiving  invalid license key error during Collaboration Services install. (4311681)

Collaboration Services may not accept trial key and gives the error  "invalid license key".

The expiry date may show accurately and appear correct.

An administrator account may not be in use to install the product or the  license file has inadequate permissions for the administrator account to install the license.

Ensure you are using an Administrator account that has all necessary access to install the system.

WORKAROUND 1
Disable User Account Control.

Note: You may need to do this from the Registry, set EnableLUA from 1 to 0

WORKAROUND 2

When starting the Autorun.exe right click and select Run as Administrator.

WORKAROUND 3

Note:  Launch the MSI from Administrative Command Prompt  manually:

msiexec /i "QCS.3.9.0.msi" /lv*! install.log ACSCOPYFILES="YES"