Assign Subscription25 licenses and Permission Sets to any user in your org that will work with Subscription25 Assign Subscription25 access
Migrating to a Sandbox
If you have Subscription25 installed on your production org, and you create a partial sandbox, Subscription25 will most likely not work properly. This is due to not all configuration records being copied to the sandbox. If you want to maintain your production org's Subscription25 configuration, there are several options:
Create a full copy sandbox.
Create a partial sandbox and migrate all your Subscription25 config data from production to the new sandbox.