Thank you for your post!
From your issue, I understand that your user has the Owner RBAC role assigned but when you navigate to the Azure AD App Registrations page, you're receiving the insufficient privileges to view application
error message.
To better understand the reason why you're running into this error, you'll have to first understand the difference between Azure RBAC roles (i.e. Owner), and Azure AD RBAC roles (i.e. Global Admin). The difference between these two role-based access control systems is:
- Azure AD roles control access to Azure AD resources such as users, groups, and applications using the Microsoft Graph API
- Azure roles control access to Azure resources such as virtual machines or storage using Azure Resource Management
To resolve your issue, as shared by Dillon - you'll need to Assign the appropriate Azure AD role(s) to your user.
- Sign in to the Azure portal or Azure AD admin center.
- Select Azure Active Directory > Roles and administrators to see the list of all available roles.
- Find the role you need.
Note: You can filter by Service: Application to get the roles able to manage App Registrations.
- Select Add assignments and then select the users you want to assign to this role.
- Select Add to assign the role.
I hope this helps!
If you have any other questions, please let me know. Thank you for your time and patience throughout this issue!