This is generally caused by a slow network connection on the client computer. Navigate to the Experience tab of the Remote Desktop client and choose a different option under Performance to reduce the bandwidth used by Remote Desktop.
1) In your Remote Desktop Connection software, click Show Options.
2) Click the Display tab. Under "Colors", choose a lower quality option.
EXAMPLE: If yours was set to 32 bit, try choosing 24 bit.
3) Click the Connect button and attempt to connect to your remote workstation again. If the connection is improved, you can use it as it is.
If the connection is still slow, you may go back to the previous step and choose a lower option, or you may wish to continue with the next step.
4) Click the Experience tab. Under "Performance", click the drop-down menu and choose a lower quality option. Also ensure that "Persistent bitmap caching" is checked.
TIP: The options at the top of the list result in a smoother connection but with lower quality. The options at the bottom of the list result in higher quality but may cause lag on slower connections.
5) Click the Connect button and attempt to connect to your remote workstation again.
Your remote desktop experience is improved.