usually when I was using UVdesk for check if the mail parse was present and detected by UVdesk I use to generate a new UVdesk instance and run the setup wizard.
The UVdesk setup wizard show you if you have all requirements.
I suggested, since long time to the UVdesk team to add a health page that help already present installation to be checked but since different months now UVdesk seems abandoned in the open source project.
I migrated to a different solution and left also the forum also if I still get an eye here sometimes