Detailed instructions to perform a Silent Installation can be found at http://leanft-help.saas.hp.com/en/12.53/HelpCenter/Content/Installation/LeanFTInstallation.htm#Silent

However it omits some parameters you need to be sure to include: the LICID and LICVER parameters. Here's a statement from HPE's document KM02461426 (quote and image from: [https://softwaresupport.hpe.com/km/KM02461426][1])

> This issue can be solved by adding two
> more parameters to the silent install
> command: the license id ''LICID'' and
> the license version ''LICVER'' as shown
> in the example command line below.
> These two parameters will update the
> correct information of the license
> token that current client (UFT) will
> be checking out. To get to know what
> values correspond to these two
> variables use the license server web
> console as seen in the image below:

setup.exe /s LICID=10594 LICVER=1 LICSVR=1x.1xx.5x.2xx ADDLOCAL=LeanFT_Engine,LeanFT_Client,RegVS2015

> License server console license Feature
> ID and Version display:

![alt text][2]

[1]: https://softwaresupport.hpe.com/km/KM02461426
[2]: /storage/temp/457-lanft-silentinstall.png