Citrix - User disconnects and prompt to log in again

Hello experts,

I have a user that is having disconnect issue with his Citrix session.  It seems that every 3-5 minutes if idle, his citrix session would disconnect and then prompt him to log in.  Other time, some publish applications would prompt him to log in again even though he is currently logging into those publish apps.  

I thought it might be a connection issue, so had him test at a different location with same issue.  Set him with wireless and still same issue.  Other users at the same facility are not having this issue except this particular user.  The strange thing is that when the user test Citrix out from home via connecting through VPN, even idling for 30 minutes doesn't disconnect him.

So I'm out of ideas on what is causing this random disconnect.  Tried uninstalling Citrix on his machine and reinstalling it with no affect.  Any ideas what to look for?
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Daniel BorgerSenior Citrix Engineer- CCEECommented:
some other things you can do to narrow this down:

Have user with issue login with a different user account and see if he gets the issue- if not, it may be something with his userprofile or settings in his network account. if problems still exsists it could be something on the users workstation or cable\jack\switchport\etc

Have troubled user use a different computer and login- if no issues it could be something with the users computer.  
holemaniaAuthor Commented:
Here's what I've tried so far.

Have user log onto Citrix on a different computer and seems to be fine.  Tried connecting user's computer to a different jack and network cable and the disconnect continues.  We tried wireless with same disconnect issue.

I have concluded that it's issue with user's laptop.  However, the strange thing is that when user connects via VPN from home, there is no disconnect issue.  So I don't know why connecting via VPN would resolve the issue but not when he's at work.
Daniel BorgerSenior Citrix Engineer- CCEECommented:
I would assume that when the user connects from home they would be using a virtiual Nic like a Cisco Systems VPN adapter. which uses a different Network Interface driver. I would suggest upgrading the NIC driver for the network adapter that is used when in the office.

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holemaniaAuthor Commented:
I think  you are right dborger.  We tried everything and it all comes down to connecting to VPN is fine, but when not connected he kept getting disconnected.  We tried this from home as well and once connected to VPN, everything is fine.

We tried deleting the NIC driver and reinstalling it with same result.  Last resort is to do a complete OS rebuild and see if this makes a difference.  It could be that he's got a bad NIC.
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