How to restrict Grafana Viewers from accessing more than 1 dashboards?

Hi there,

Thank you for posting the question. For dashboards and dashboard folders, you can use the Permissions page to remove the default role based permissions for Editors and Viewers. On this page, you can add and assign permissions to specific Users and Teams. Please note that the viewers and editors can only see dashboards to which they have access to and not all dashboards. This can be disabled on specific folders and dashboards.

For more details, please refer to the below links:

[+] User roles [+] Sharing a dashboard

To, grant dashboard access permissions to your users (editors/viewers), please refer the steps mentioned here:
 Dashboard and folder permissions - Granting dashboard permissions

Also, please note that the highest permission always wins. For more information on this and relevant examples for your better understanding, please refer here: Dashboard and folder permissions - How Amazon Managed Grafana resolves multiple permissions

Thank you!