RDP to connect from an external PC

Small domain with Windows Server 2012.  Several users connect to their work PC when it is off site.  Usually, I have no problem with setting this up for them.

About 4 to 6 weeks ago a user bought a new Dell OptiPlex, Windows 7 PC for home use.  It runs Windows 7 Pro.  I implemented a RDP connection to his work PC and tested at home, as I usually do, to make sure it works OK.  I sent him the link and it fails to connect.  I won his personal PC and tested.  No luck at all.  I changed the setting of firewall - I even completely its firewall, temporarily disabled.  I am sure that the RDP connection is implemented, as I have copied from my own PC, it runs OK.

Any thoughts, please?

This issue is beyond the scope of this site (for consumers) and to be sure, you get the best (and fastest) reply, we have to ask either on Technet (for IT Pro) or MSDN (for developers)

If you give us a link to the new thread we can point to some resources it

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