We built new PVS vDisk on XenServer for switching workloads from Vmware. Users are getting XenTools pop-up message as in the screenshot when opening published applications, this is not happening for RDP or published desktop sessions. Any suggestions?

Extra reboot in your vDisk in r/w?

We are using mandatory profile, adding the following registry to mand profile suppressed the pop-up XenTools was installed successfully.