Windows 7 : Dial-in tab Missing
Copy the following files from a Windows Server 2008 R2 installation to a folder on your computer:
Windows\system32\mprsnap.dll
Windows\system32\rasuser.dll
Windows\system32\rtrfiltr.dll
Windows\system32\en-US\mprsnap.dll.mui
Windows\system32\en-US\rasuser.dll.mui
Windows\system32\en-US\rtrfiltr.dll.mui
Execute the following commands to enable the functionality within dsa.msc:
copy mprsnap.dll C:\Windows\system32\
copy rasuser.dll C:\Windows\system32\
copy rtrfiltr.dll C:\Windows\system32\
copy mprsnap.dll.mui C:\Windows\system32\en-us\
copy rasuser.dll.mui C:\Windows\system32\en-us\
copy rtrfiltr.dll.mui C:\Windows\system32\en-us\
regsvr32.exe C:\Windows\system32\rasuser.dll