https://learn.microsoft.com/en-us/dotnet/api/microsoft.identity.client.msalserviceexception?view=msal-dotnet-latest
MsalServiceException Class (Microsoft.Identity.Client) - Microsoft Authentication Library for .NET...
Exception type thrown when service returns an error response or other networking errors occur. For more details, see https://aka.ms/msal-net-exceptions
identity clientclassmicrosoftauthenticationlibrary