Once the Cosmos tenant has been created and the file storage has been configured, the next step is to add additional users from your organization to Cosmos so that they have access. This article covers how to add these additional users.
The video above provides a quick walkthrough of adding additional users into the Cosmos Portal, and there are several additional resources available in the Knowledgebase for adding additional users. Links to those resources are below:
Now you're ready to take the next step: Getting Started: Publishing the Cosmos Excel Add-In for Report Editors