how to uninstall adobe reader? administrator that installed it is no longer at facility. have no IT Team

Policies are in this case a Windows thing. Your administrator set it up so you cannot administer it yourself. You need expert hands on help To administer it or to remove all the protection and turn it back to a normal system. Assuming their passwords are known. It might be easiest to wipe everything and start again - except you probably have critical business info on your computers. Be careful, the loss of an administrator is a dangerous time  More important than anything is to make sure your backups are still working every night.

you'll probably need admin privileges and those are probably password protected.