Display Microsoft Terminal Services ActiveX Control (or Microsoft RDP Client Control)

Updated: March 27, 2009

Applies To: Windows SBS 2008

To display the Microsoft Terminal Services Client ActiveX Control (or the Microsoft RDP Client Control) in the Manage Add-ons dialog box

Click Start, in the Search box type regedit, and then press ENTER.

Caution
Incorrectly editing the registry may severely damage your system. Before making changes to the registry, you should back up any valued data on the computer.

On the User Account Control page, click Continue.
Navigate to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Ext\Settings\, right-click {7584C670-2274-4EFB-B00B-D6AABA6D3850}, and then click Delete.
Close and restart Internet Explorer, and then try to connect to the computer by using Remote Web Workplace again. If you still get a message that says, “The Microsoft Terminal Services Client ActiveX Control (also known as Microsoft RDP Client Control) is unavailable,” proceed to step 5 to re-register the mstscax.dll file.
Click Start, click Run, in the Open box type %windir%\system32\regsvr32 mstscax.dll (see Figure 16), and then click OK.
To confirm, click OK.
Restart Internet Explorer, and then connect to your desktop from the remote computer by using Remote Web Workplace.