Activation center requires Windows (IIS) web server with direct access to IIS settings , enabled ASP .NET 4 .8 or later version and MS SQL server (see requirements).
Create web site for Activation center in IIS
You can dedicate web site solely for ACEN (for example: https://www.youractivationsite.com) or you can create new subdomain on existing site for ACEN (for example: http://acen.yoursite.com).
Install and enable latest version of .NET framework.
If not already installed, download and install latest version of ASP .NET framework.
You should see the following section in your web site settings in IIS:
If not already present, add default.aspx to the list of default documents.
Set "Load user profile" option to TRUE in advanced application pool settings for ACEN website.