SymptomsThe "ASP.NET" tab is not available in the website property in IIS, as is shown in the below image:
CauseThis is not an error, but a Windows-designed behavior. The "ASP.NET" tab is available if both of these statements are true:
1. There are at least two .NET framework versions installed:
ResolutionOn Parallels Plesk Panel-managed servers based on 64-bit OSes, there is no supported way to display the tab.
However, there is not any practical value of having the tab because in native 64-bit mode, only ASP.NET 2.0 is available:
Furthermore, the Parallels Plesk Panel front-end needs ASP.NET 32-bit enabled; see article #2099.
Although it is possible to follow the directions in article #2131 to enable the tab, if you do, Parallels Plesk Panel and some APS Catalog Applications may stop working.