Final answer:
To install and configure the Unified Service Desk (USD) client, you should import it as a solution and manually install it on the user's machine.
Step-by-step explanation:
To install and configure the Unified Service Desk (USD) client, you should import the USD client as a solution. This can be done by navigating to the Settings area in Microsoft Dynamics 365 and then selecting 'Solutions'. From there, you can import the USD client as a solution file. Once imported, you can configure the USD client according to your needs.
It is important to note that the USD client needs to be installed and configured on the user's machine. This can be done manually by downloading the client installer file from the Microsoft Dynamics 365 server and running the installation process.
Enabling the USD client from System Settings is not the correct method to install and configure the client. System Settings in Microsoft Dynamics 365 allow you to configure various system-wide settings, but it does not involve the installation and configuration of the client itself.