How to Enable Legacy Client Drive Mapping Format on XenApp 6 and 6.5

Summary

With XenApp 6.0 and XenApp 6.5, 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 example:

There are instances that require an administrator to enable legacy client drive mapping in XenApp 6.0 and XenApp 6.5 so that unique drive letters are used to map client drives:

Procedure

To enable legacy client drive mapping on XenApp 6.0 and XenApp 6.5, the following registry key must be set on the server:

Caution! This procedure requires you to edit the registry. Using Registry Editor incorrectly can cause serious problems that might require you to reinstall your operating system. Citrix cannot guarantee that problems resulting from the incorrect use of the Registry Editor can be solved. Use the Registry Editor at your own risk. Back up the registry before you edit it. Create this registry key if it does not exist:

HKEY_LOCAL_MACHINE\Software\Citrix\UncLinks\

Under the key, create a DWORD: UNCEnabled.
Set the value of UNCEnabled to “0”.