Per the Microsoft Power Apps Share an embedded canvas app article – need to share the embedded canvas app with Everyone in your organization, a security group and/or specific users.
Here is an example screen shot showing sharing the app with Everyone, a Microsoft 365 security group, and a specific user. Note: If sharing with Everyone – then NO need to share with specific users.
Ensure the users have appropriate permissions for any Microsoft Dataverse tables (entities) that the embedded canvas app uses – this means checking the usual Dynamics 365 / Power Apps Security Roles and assigning them properly. In-addition, ensure at least one of the assigned Dynamics 365 / Power Apps Security Role has read permissions (full green circle) for the “Canvas App” table under the “Customization” tab and the “CanvasApp Extended Metadata” table under the “Custom Entities” tab
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