With XenApp 6.x and later, Citrix changed the format on how to display mapped client drives. In earlier releases, drives where mapped to a physical letter. With this release, a redirection similar to Terminal Services is implemented, that displays the drive as a local disk and the source device it is mapped from. Client drives therefore appear as “Local Disk” as in the following screen shot:

There are instances that require an administrator to enable legacy client drive mapping in XenApp so that unique drive letters are used to map client drives:

Instructions

To enable legacy client drive mapping on XenApp, the following registry key must be set on the server:

Caution! Refer to the Disclaimer at the end of this article before using Registry Editor.

1. Create this registry key if it does not exist:
   HKEY_LOCAL_MACHINE\Software\Citrix\UncLinks\

2. Under the key, create a DWORD: UNCEnabled.

3. Set the value of UNCEnabled to “0”.