Using multiple monitors on a Lenovo T420i and a docking station

I have a Lenovo 420i attached to a docking station which has 2 DVI ports nad one VGA port.  One DVI port is being used, so I have one external monitor.  I want a 2nd external monitor.  Can I attach  and use a second external monitor on either the 2nd DVI port or the VGA port?

Hi The_skwire,
Welcome to Lenovo Community!
As per the query we understood that you are looking 2 external monitors for your ThinkPad T420i.
Yes, it will support 2 external monitor, and also make sure graphic driver are up to date.
Hope this helps.
Best regards,
Hemanth Kumar
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