Keyboard Command to Access System Tray in Ubuntu Mate 16.1?

[Al Puzzuoli]

Hi all,

I am venturing back into the world of Ubuntu and Orca after several 
years of being away. I'm currently using Ubuntu Mate 16.10. For the most 
part, everything is going splendedly, but I just hit my first little 
snag. I installed the Private Access VPN service. I believe their app 
has installed successfully; but the docs say that "Once the software is 
successfully installed, you should see a client icon in your system tray 
near the clock". how would I go about accessing this icon via the 
keyboard using Orca? I'm sure I could work around this issue. There may 
be a way of running their app from the command line and if not, the 
service does support direct use of the Open VPN client. Is there a way 
of accessing the system tray that I'm just not aware of, or is this not 
possible under Mate? If the latter is true, is Mate the best choice, or 
should I be looking at either classic Gnome or Unity?

Thanks for any thoughts,

Al