By default, the organization-wide sharing setting for both Projects and Portfolios is set to "Private". This means that the Project/Portfolio owner is the only one who has read and write access to the Project/Portfolio.
For more information on how to share Projects, please see Options for Sharing Projects.
If you would like to grant another Inspire Planner user access to your Portfolio, you will need to add them as a Portfolio Collaborator. Portfolio Collaborators are also automatically added as a collaborators with "Read-only" access to the Projects included in your Portfolio.
This help article will walk you through how to add Portfolio Collaborators.
This section will walk you through how to add collaborators to your Portfolios.
This section will walk you through how to change a Portfolio collaborator's permissions.
This section will walk you through how to remove a collaborator from your Portfolio.