Login to the Power Platform admin center on Microsoft. On the navigation page, click on “Environments”
Select the environment that you desire to install Dynamics 365 sales professional on and then choose the “Dynamics 365 apps” option.
This will give you an option to “Install the app” on the top. Then select “Dynamics 365 Sales Professional” option to begin installation.
This will redirect you to a terms and conditions page and once they are agreed upon, it will give the option to “Install”.
Then go to the homepage of Dynamics 365 and choose Dynamics 365 Sales Professional to start using it.
However, an important pre-condition is that to install the Sales Professional, there should be a Dynamics 365 environment pre-installed or else the app cannot be installed. You also should set up Dynamics 365 Sales before deploying Sales Professional. The installation can be carried out by a layman, however, if further assistance is required then there are sales representatives available to help with the process. There are demos available by the representatives to guide you through the process. You can also request to call for further guidance or technicalities.