Install .NET Framework 3.5 when the Features Source files could not be found in Windows Server 2012

1. Open Server Manager

2. On the menu, click Add Roles and Features and follow the prompts to get to the Features page

3. Insert Windows Server 2012 installation DVD in the computer/server DVD ROM Drive

4. Select the .NET Framework 3.5 Features installation in the Add Roles and Features Wizard screen to install it

5. When in the Confirm installation selections screen, Select Specify an alternative source path

6. In the Path tab, input the DVD Rom drive letter and the path to the sxs directory (the same will need to be done if a Windows Server 2012 iso image was mounted, as mentioned previously) and select OK

7. Select Install in the Confirm installation selections screen

8. The Installation succeeded message should be displayed. Select Close to terminate the Add Roles and Features Wizard