To install and activate license for RMsis in your Jira Cloud, you can follow these steps:
1. Go to RMsis listing page in the Atlassian marketplace and click on the Try it free button
2. The following pop-up will be displayed. Click on Start free trial to install RMsis and begin the trial.
A trial license is automatically generated and added for RMsis. Click on Manage App to see license details.
Once the trial expires, your paid license will be automatically activated.