有一种简单的方法可以做到这一点(作为管理员)，它需要您为 Powershell 安装 AzureAD 和 AzureRM 模块，并且不受 Microsoft 支持.

There is an easy way to do this (as admin), it requires you have the AzureAD and AzureRM modules installed for Powershell and is not supported by Microsoft.

原始帖子/对我博客的引用在这里:http://www.lieben.nu/liebensraum/2018/04/how-to-grant-oauth2-permissions-to-an-azure-ad-application-using-powershell-unattended-silently/

Original post / reference to my blog is here: http://www.lieben.nu/liebensraum/2018/04/how-to-grant-oauth2-permissions-to-an-azure-ad-application-using-powershell-unattended-silently/

应该可以帮助您完成此操作的特定代码示例:

The specific code sample that should help you accomplish this:

Function Grant-OAuth2PermissionsToApp{
Param(
    [Parameter(Mandatory=$true)]$Username, #global administrator username
    [Parameter(Mandatory=$true)]$Password, #global administrator password
    [Parameter(Mandatory=$true)]$azureAppId #application ID of the azure application you wish to admin-consent to
)

$secpasswd = ConvertTo-SecureString $Password -AsPlainText -Force
$mycreds = New-Object System.Management.Automation.PSCredential ($Username, $secpasswd)
$res = login-azurermaccount -Credential $mycreds
$context = Get-AzureRmContext
$tenantId = $context.Tenant.Id
$refreshToken = @($context.TokenCache.ReadItems() | where {$_.tenantId -eq $tenantId -and $_.ExpiresOn -gt (Get-Date)})[0].RefreshToken
$body = "grant_type=refresh_token&refresh_token=$($refreshToken)&resource=74658136-14ec-4630-ad9b-26e160ff0fc6"
$apiToken = Invoke-RestMethod "https://login.windows.net/$tenantId/oauth2/token" -Method POST -Body $body -ContentType 'application/x-www-form-urlencoded'
$header = @{
'Authorization' = 'Bearer ' + $apiToken.access_token
'X-Requested-With'= 'XMLHttpRequest'
'x-ms-client-request-id'= [guid]::NewGuid()
'x-ms-correlation-id' = [guid]::NewGuid()}
$url = "https://main.iam.ad.ext.azure.com/api/RegisteredApplications/$azureAppId/Consent?onBehalfOfAll=true"
Invoke-RestMethod -Uri $url -Headers $header -Method POST -ErrorAction Stop
}