Actually, i'm having the same issue, and it doesn't appear to be a setting in place by the person "in charge of the system".
I do remote support overnight once a month. However I also work from home and remote into my work PC to get stuff done.
For the past two years, I've used the same two computers (Of which, I am the administrator) to do the same function, VPN in, then Remote desktop into my work PC.
This has ALWAYS worked. In fact, this worked on Tuesday. However, when I went to remote in on Thursday, I began receiving this error. I spoke with my system administrator and nothing with my account changed; an hour later, I was able to remote in with no problem.
But today, I have not been able to remote in at all! This is extremely frustrating and I cannot get work done.