The answer below is applicable to versions 3.28 (August 2019) and later of the Workstation. For earlier versions, IIS Express is a non-optional component.
IIS Express 10 is a lightweight web server developed by Microsoft. It is no longer strictly required in order to use the Workstation but, without it, the View data part of the application cannot be used. We strongly recommend that you install IIS Express and it is included by default in our standard .exe installer.
IIS Express does not configure your computer to accept external connections; we use it solely to connect parts of the Workstation running on the same machine. However, we understand that some organisations prefer not to install IIS Express on desktop computers.
For the standard .exe installer, you may opt out of IIS Express installation using this dialog:
For the "unbundled" .msi installer, you are already responsible for installing dependencies yourself and you may simply choose not to install IIS Express.
If IIS Express is not installed, or is later uninstalled, the Workstation will automatically detect this and disable the View data feature.
Also, you will not be able to retrieve local data from the Workstation via the Oxford Economics Excel plugin, though the Local model database file option will still be available.