Desktop Application Distributions can be sent between trees. However, you must do the following for this to work:
Create an External Subscriber object in the Distributor's tree that points to the target server in the other tree where you want to send the Desktop Application Distribution.
This will enable the Distributor server to send the Distribution directly to the target server using the IP address listed in the External Subscriber object.
The target server that is to receive the Desktop Application Distribution must have a Subscriber object in its own tree, so that it will have the rights to eDirectory for creating the new Desktop Application object in that tree.
This Subscriber must within a working Tiered Electronic Distribution system.
Set the working context in the Subscriber object for the target server, if this was not done during installation.
If the working context is not set for the target server, authentication will fail during the extraction process.
Create the Desktop Application Distribution (see Creating a Desktop Application Distribution).
Defining the Desktop Application Distribution is the same process, whether it is being sent within a tree or across trees.
Add the External Subscriber object to the Channel where the Desktop Application Distribution is listed.
Manually copy the certificates to the Subscriber in the target tree.
Send the Distribution.