1. 在脚本中添加以下代码，将默认TLS版本更改为1.2：

[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12

2. 如果还出现错误，请尝试使用以下方法之一：

（a）更新PowerShell版本以支持TLS 1.2

（b）尝试使用其他调用B2C的API（例如Microsoft Graph API）而不是Connect-MsolService函数，因为它们已更新以支持TLS 1.2。

示例代码：

$adminUsername = "[admin_username]" $adminPassword = "[admin_password]" $tenantId = "[tenant_id]" $clientId = "[client_id]" $clientSecret = "[client_secret]" $authority = "https://login.microsoftonline.com/$($tenantId)/"

$context = New-Object Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContext($authority) $context.TokenCache.Clear()

$credential = New-Object "Microsoft.IdentityModel.Clients.ActiveDirectory.UserCredential" -ArgumentList $adminUsername, $adminPassword $token = $context.AcquireToken("$($authority)$($tenantId)", $clientId, $credential)

$headers = @{ Authorization = "Bearer $($token.AccessToken)" 'Content-Type' = "application/json" }

$url = "https://graph.microsoft.com/v1.0/users" $response = Invoke-RestMethod -Uri $url -Headers $headers -Method Get