With Credentials Pass-Through enabled within a vWorkspace farm, the x86 based clients can authenticate using SSO (Single Sign On/ Credentials Pass-Through), however x64 based clients fail. (Such as Windows Vista x64 or Windows 7 x64)
This is a Defect within the x64 client for vWorkspace 7.0. The Defect ID is 1914 / 152737
The workaround is as follows:
1. From Windows\system32 locate PNSSO.dll.
2. Copy this file to windows\syswow64
3. From Windows\syswow64 locate PNSSOAGT and PNSSOSVR
4. Copy both files to windows\system32
5. If the user you are signed in with is the user you are testing with you will need to log off/ log on before testing.
6. Test the App Portal.
This issue has been resolved in vWorkspace 7.5