[Slow speed through client mapped drive]

In our situation it looks like it is a DNS issue. As soon as the Citrix server is able to resolve the client name, performance is as it is supposed to be. (I Don't know if this has an impact but we have multiple nics on our citrix servers: mgmt & prod)

[Slow speed through client mapped drive]

I have exact the same problem. I noticed that copying files logged on as an administrator solves the problem.
But I don't know why