How can get Adobe Reader Pro and editing tools installed across the other devices in our offices?

Ok, Acrobat Pro is still available, but Acrobat Pro XI is discontinued. It is now Acrobat Pro DC.

You can buy individual licenses or subscriptions, for each user. However, this requires each user to have their own separate Adobe ID (and billing, for a subscription). So you should probably look at volume licensing.

If you are uncertain of what the product entails, you can download a demo of Acrobat Pro DC for 30 days.

If you want help deploying Acrobat, there is a forum on Enterprise Deployment and lots of info there.