Set Permissions for the Azure AD SCIM Managed Identity

After you have published the SCIM microservice app to Azure, run the following PowerShell script to assign Graph API permissions to the app service managed identity.

Set Graph API Permissions

Permissions follow the least-privilege principle and include the following:

The above permissions have been added to the script's PermissionsToAdd parameter, shown below. In addition to adding the permissions, you need to enter values for these parameters:

• tenantID — Your Tenant ID

• appServiceObjectID — Object ID of the SCIM App Service

###############
## GRAPH API ##
###############
Param(
    $tenantId = "",
    $appServiceObjectID = "", 
    $PermissionsToAdd = @("Organization.Read.All", "User.Read.All", "Group.Read.All", "GroupMember.ReadWrite.All", "Reports.Read.All", "AuditLog.Read.All")
)

# Install AzureAD module if not installed
if (-Not(Get-Module -ListAvailable -Name AzureAD)) {
    try {
        Install-Module AzureAD -Force
    }
    catch {
        if ($_.Exception.Message.Contains("Administrator rights")) {
            Write-Host "You must run the script with administrator rights"
            
        }
        else {
            Write-Error $_.Exception.Message
        }
        
    }
}


if (Get-Module -ListAvailable -Name AzureAD) {
    # Check if connected to the target Azure AD Tenant
    try { 
        $tenantDetail = Get-AzureADTenantDetail 
    } 
    catch [Microsoft.Open.Azure.AD.CommonLibrary.AadNeedAuthenticationException] 
    { 
        Write-Host "You're not connected."; 
        Connect-AzureAD -TenantId $tenantId;
        $tenantDetail = Get-AzureADTenantDetail 
    }

    if ($tenantDetail.ObjectId -ne $tenantId) {
        Write-Host "You're not connected to the tenant: " $tenantId; 
        Connect-AzureAD -TenantId $tenantId;
    }


    # Managed Identity for the SCIM App Service | Found in App Service -> Identity 
    $ManagedIdentitiesServicePrincipal = Get-AzureADServicePrincipal -Filter "ObjectId eq `'$appServiceObjectID`'"
    if ($ManagedIdentitiesServicePrincipal -eq $null) {
        throw "Managed Identity for the app service is not found. `nApp Service Object ID: $appServiceObjectID "
    }

    # Resource Name : Microsoft Graph | Resource URI : https://graph.microsoft.com | Application ID : 00000003-0000-0000-c000-000000000000
    $GraphAppId = "00000003-0000-0000-c000-000000000000"
    $GraphServicePrincipal = Get-AzureADServicePrincipal -Filter "appId eq '$GraphAppId'"

    # Permissions
    foreach ($PermissionToAdd in $PermissionsToAdd) {
        $AppRole = $GraphServicePrincipal.AppRoles | Where-Object {$_.Value -eq $PermissionToAdd.Trim() -and $_.AllowedMemberTypes -contains "Application"}
        if ($AppRole -eq $null) {
            Write-Error "Invalid Permission `nPermission name: $PermissionToAdd"
        }
        else {
            # Assigns a Graph API service principal to an application role
            try {
                New-AzureAdServiceAppRoleAssignment -ObjectId $ManagedIdentitiesServicePrincipal.ObjectId -PrincipalId $ManagedIdentitiesServicePrincipal.ObjectId -ResourceId $GraphServicePrincipal.ObjectId -Id $AppRole.Id -ErrorAction Stop
            }
            catch {
                if ($_.Exception.ErrorContent.Message.Value.Contains("Permission being assigned already")) {
                    Write-Host "`""$AppRole.DisplayName"`"" " Permission is already assigned on the app service"
                }
                else {
                    Write-Error $_
                }
            }
        }
    }
}

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Set Azure REST API Permissions

If you are managing Azure roles in EmpowerID, in addition to setting the above permissions via PowerShell, you need to create a custom role in Azure and add the below permissions scoped to the appropriate Azure subscription(s) you want to manage in EmpowerID. These permissions allow EmpowerID to call the relevant Azure REST API endpoints needed to manage Azure roles.

Table 1: Permissions needed to manage Azure roles in EmpowerID

To set the Azure REST API Permissions for the target subscription, do the following:

1. In Azure, navigate to the target subscription and select Access control (IAM) from the Azure navbar.

2. On the Access Control (IAM) page, click Add and select Add custom role.
   

   

3. Under Basics, enter a Custom role name.

4. Select the Permissions tab and click Add permissions.
   

   

5. Search for Microsoft.ManagedIdentity and click the Microsoft Managed Identity tile.
   

   

6. For Actions, under Microsoft.ManagedIdentity/userAssignedIdentities, select the following:

   • Read : Get User Assigned Identity

   • Write : Create/Update User Assigned Identity

   • Delete : Delete User Assigned Identity

7. Click Add.
   

   

8. Back on the Create a custom role page, click Add permissions again and then search for Microsoft.Authorization.

9. Click the Microsoft Authorization tile and then add the below permissions:

   • Microsoft.Authorization/roleAssignments

     • Read : Get role assignment

     • Write : Create role assignment

     • Delete : Delete role assignment

   • Microsoft.Authorization/roleDefinitions

     • Read : Get role definition

     • Write : Create or update custom role definition

     • Delete : Delete custom role definition

10. Click Add.
    

    

11. Back on the Create a custom role page, click Add permissions again and then search for Microsoft.Authorization.

12. Click the Microsoft Management tile and select Read : List Groups under Microsoft.Management/managementGroups.

13. Click Add.
    

    

14. Back on the Create a custom role page, click Add permissions again and then search for Microsoft.Resources.

15. Click the Microsoft Resources tile and then select the following permissions:

    • Microsoft.Resources/subscriptions/resourcegroups

      • Read : Get Resource Group

    • Microsoft.Resources/subscriptions/resources

      • Read : Get Subscription Resources

16. Click Add.

17. Back on the Create a custom role page, select the Assignable scopes tab and verify the scope.
    

    

18. Click Review + Create.

19. Review the permissions and then click Create.
    

    

20. Click OK to close the “created custom role” message.
    

    

    
    Now that you have created the custom role with the needed permissions, you need to assign the Azure AD SCIM microservice to the role.

21. On the Access control (IAM) page, click Add > Add role assignment.
    

    

22. In the Add role assignment pane that appears, enter the following:

    • Role – Select the custom role you just created

    • Assign access to – App Service

    • Subscription – Target subscription

    • Select – The SCIM app service you created earlier.

23. Click Save to add the role assignment.
    

    

24. On the Access control (IAM) page, select the Role assignments tab. You should see the SCIM app service you created assigned to the custom role.

Next Steps

Connect EmpowerID to Azure Active Directory