Go to the Stakeholders page on the left navigation.
Click on Draft Invites (the gray button next to 'Actions' in the top right).
Check the stakeholders you want to invite to Pulley. You can see an example of what your stakeholder will see here.
If you haven't added stakeholder emails yet, you can do so at this stage by clicking on the gray 'Add Emails' button in the top right.
Click the green 'Invite Stakeholders' button to then invite your stakeholders to Pulley.