The SHIFT key does not work (sporadic capitals and non-capital letters) when launching a published Microsoft RDP client (5.2.3790.1830) from the Windows 2003 operating system and using the client for Java or other non-Windows Citrix Recievers.
When the Apply Windows key combinations setting is set to On the remote computer, the RDP client hooks into the keyboard at a lower level and this doesn’t appear to interact properly with the Presentation Server’s Unicode keyboard support.
Applies to all non-windows ica clients:
ICA Client for Java
ICA Client for Mac
Change the RDP client settings as follows:
1. Click Options in the Remote Desktop Connection User Interface.
2. Select the Local Resources tab.
3. Under Keyboard > Apply Windows key combinations, select On the local computer.
After doing this, the SHIFT/ALT/CTRL keys work as expected in the RDP session.
Refer to CTX104566 – [Document Not Found].
To update the RDP client, search RDP client.