Is there any way to change the default resolution of the mstsc?
I don't want it to default to the full resolution of the client machine
Yes just slide back another notch to whatever resolution you want Then go back to the general tab and click the save button
Hey presto, new default :-)
While you're at it, usually doesn't hurt to go to the local resources tab and uncheck printers and review what else is shared (seriously, who ever prints over rdp? ).