Update App Registration Approles by Microsoft Graph API Patch method returns always Unable to read JSON request payload - azure

Question

On a App Registration I want to remove the App Roles by first disable the active ones and afterwards removing them.
I checked the commands by the developer tools what is executed and I come to the following request:
$graphApiUrl = 'https://graph.microsoft.com/v1.0/applications'+'/'+$apiAppReg.appId
$body = '{"appRoles":[{"description":"Applications can read","displayName":"Reader","id":"xxxxxxx-xxxx-xxxx-xxxx-xxxxxx","isEnabled":false,"value":"Read","allowedMemberTypes":["Application"]}]}
'
az rest --method PATCH --url $graphApiUrl --headers 'Content-Type=application/json' --body '$body'
I tried this in all orders, but it seems that this is resulting in an error.
btw. the boby is copy from the request from the azure website

Answer 1

After reproducing from my end, I could able to achieve your requirement using PowerShell. To Disable the App Role I have set IsEnabled=$false for each app role in my Application.
Below is the script that worked for me to disable the app role.
$App = Get-AzureADApplication -Filter "appId eq '$appId'"
$AppRoles = $app.AppRoles
for($I=0;$I -lt $AppRoles.Count;$I++)
{
$app.AppRoles[$I].IsEnabled=$false
Set-AzureADApplication -ObjectId $app.ObjectId -AppRoles $AppRoles
}
To Remove the app roles from the application I have used $AppRoles.Remove($AppRoles[$I]). Below is the complete code that worked to delete the app roles from my Application.
for($I=0;$I -lt $AppRoles.Count;$I++)
{
$AppRoles.Remove($AppRoles[$I])
Set-AzureADApplication -ObjectId $app.ObjectId -AppRoles $AppRoles
}
Below is the complete working code
Connect-AzureAD
$AppId = "<APPLICATION_ID>"
$ObjectId = "<OBJECT_ID>"
$App = Get-AzureADApplication -Filter "appId eq '$appId'"
$AppRoles = $app.AppRoles
for($I=0;$I -lt $AppRoles.Count;$I++)
{
$app.AppRoles[$I].IsEnabled=$false
Set-AzureADApplication -ObjectId $app.ObjectId -AppRoles $AppRoles
}
for($I=0;$I -lt $AppRoles.Count;$I++)
{
$AppRoles.Remove($AppRoles[$I])
Set-AzureADApplication -ObjectId $app.ObjectId -AppRoles $AppRoles
}