Can't Remote Destop Connect to Domain PC from a Mac using VPN

Basically I have set up a VPN on our domain. It's functioning perfectly. Clients are able to connect to the VPN and remote to their office computers (PCs). Both Mac and PC users are able to connect just fine.

I have this one Mac user that cannot Remote Desktop to her office computer or any other PC for that matter when connecting through VPN.

The mac was connecting successfully before I changed the IP address of the VPN server. I thought it might be that the DNS cache needs to be flushed so I did that using "sudo killall -HUP mDNSResponder". I haven't tested it since I can't test the VPN from within our network. have to be at home.

Incidentally Remoting to a computer while on the domain works just fine.

All of the settings are correct. I've attached a document that has detailed pictures of all the settings

Mac version 10.7
ronfastI.T. DirectorAsked:
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ronfastI.T. DirectorAuthor Commented:
Is there something else I need to do besides flushing the DNS cache?
You should try to ping devices behind your VPN from the MAC, make sure the traffic is actually being routed.

Also, ensure that the VPN IP Range, does not overlap with what's being assigned by the remote user's firewall.
Tony JLead Technical ArchitectCommented:
This is a problem for OS/X Lion upwards I'm afraid.

Info from here:

(Under system requirements):

Mac OS X
Operating System Versions: Mac OS X version 10.5.8 or a later version of Mac OS.

Note  Microsoft Remote Desktop Connection Client for Mac (version 2.1.1) is not supported for use with Mac OS X v10.7 (Lion) or later.

Someone has made 2.1.2 available here: but caveated with it's not an official MS source.

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ronfastI.T. DirectorAuthor Commented:
Thank you. This is the info I've been looking for
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