Replacing termdd.sys did the trick! Thanks for the help.

Terence Liu [MSFT] wrote:
> Hello Jonathan,
>
> Thank you for your update.
>
> This is really a strange issue.
>
> Do you install the windows server 2003 sp2 on your SBS? If yes, please
> perform the following steps:
>
> a. Copy the "termdd.sys" file from the Service Pack 2 cab folder located in
> "%WINDOWS%\Driver Cache\i386" to the "%windows%\system32\drivers".
>
> b. Please ensure Terminal Services on SBS is started. If it stop, please
> start it manually.
>
> c. Restart SBS and test this issue.
>