See G Koe's answer:
Easy answer #1, lower your screen resolution before connecting to the server in question. Problem solved!
More difficult but more interesting way #2:
Create an RDP file at the resolution that you want, by opening mstsc.exe and setting up the name of the computer that you are connecting to and choosing a resolution OTHER THAN FULLSCREEN on the display tab, I would suggest a 16:10 resolution like these:
If this is helpful please accept answer.