1ToDo/Get-RBACRoleDefinition.ps1

<#
 
.COPYRIGHT
Copyright (c) Microsoft Corporation. All rights reserved. Licensed under the MIT license.
See https://github.com/microsoftgraph/powershell-intune-samples/blob/master/LICENSE for license information.
 
#>


Function Get-RBACRoleDefinition() {
    
        <#
    .SYNOPSIS
    This function is used to get an RBAC Role Definition from the Graph API REST interface
    .DESCRIPTION
    The function connects to the Graph API Interface and gets any RBAC Role Definition
    .EXAMPLE
    Get-RBACRoleDefinition -id $id
    Returns an RBAC Role Definitions configured in Intune
    .NOTES
    NAME: Get-RBACRoleDefinition
    #>

    
        [cmdletbinding()]
    
        param
        (
            $id
        )
    
        $graphApiVersion = "Beta"
        $Resource = "deviceManagement/roleDefinitions('$id')?`$expand=roleassignments"
            
        try {
    
            if (!$id) {
    
                write-host "No Role ID was passed to the function, provide an ID variable" -f Red
                break
    
            }
            
            $uri = "https://graph.microsoft.com/$graphApiVersion/$($Resource)"
            (Invoke-RestMethod -Uri $uri -Headers $authToken -Method Get).roleAssignments
            
        }
            
        catch {
    
            $ex = $_.Exception
            $errorResponse = $ex.Response.GetResponseStream()
            $reader = New-Object System.IO.StreamReader($errorResponse)
            $reader.BaseStream.Position = 0
            $reader.DiscardBufferedData()
            $responseBody = $reader.ReadToEnd();
            Write-Host "Response content:`n$responseBody" -f Red
            Write-Error "Request to $Uri failed with HTTP Status $($ex.Response.StatusCode) $($ex.Response.StatusDescription)"
            
            break
    
        }
    
    }