SSO
Thinprint is not supported (which means you have to manually install print drivers in the vm)
Access to local drives
Manually attach USB drives
Because of these issues we will not be able to use PCOIP.
SSO should work fine, unless you have a policy set to display legal text before login or you are using GINA chaining. Are you doing either of those?
No not using either.
Another problem you can not switch between RDP and PCOIP unless you reboot the virtual machine.
Well not entirely. But we do not reccomend it. There are a few cases where doing can leave things in a bad state because RDP actually ends up in a bad state blocking future connections.
WP
I have not been able to switch from the 2 different protocols without rebooting. I know this because we had to switch from PCOIP to RDP as the default pool protocol and users could not login without me rebooting their VM.