user pulling in gmail pop from Groupwise 2014 are getting below error

10:32:08 AM Connecting to pop.gmail.com
10:32:08 AM S:-ERR The security certificate was issued by a company you have not chosen to trust.

10:32:08 AM C:QUIT

As far as can tell, current google certificates are installed and trusted as obtained via pki.google.com.

Solutions?