I have a new Azure VM (the Visual Studio Professional 14 CTP 2 Windows Server 2012 R2 image) and I'm trying to install SQL Server on it. The installation fails because it cannot see the .NET Framework 3.5 installed. There are two ways I know of to fix this, one is to run
DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:"D:\sxs"
from an elevated command prompt and one is to enable the feature in the Add Roles and Features Wizard.
In each case I need the location of the source files. I think this would usually be on one's installation disk but since I'm on an Azure VM there is no installation disk. What should I use as the source path? How do I enable the .NET Framework 3.5 on an Azure VM created from a Windows Server 2012 R2 image?