Dear Adam,

Sending bulk PHR invitations is not possible from the UI. They have to be sent separately. But you can do that quickly from 'Analytics > PHR Usage' section. Here, click on 'Patients without PHR' link available for the Pie chart  and the list of patients will be displayed. You can use the 'Invite' button shown there to send invitations to the patients.

Feel free to contact us at support@charmehr.com for any further questions/clarification.

Regards,
Samba