使用MIP SDK解密.msg文件时发生异常：NoPolicyException：标签策略不包含数据

如何解决使用MIP SDK解密.msg文件时发生异常：NoPolicyException：标签策略不包含数据

我跟随this和this使用MIP SDK解密.msg。以下是我的代码：

class Program
{
    private const string clientId = "[test client id here]";
    private const string appName = "MIPSDKTestApp";

    static void Main(string[] args)
    {
        Console.WriteLine("Provide path to protected msg file:");
        string inputFilePath = Console.ReadLine();
        string outputFilePath = Path.Combine(Path.GetDirectoryName(inputFilePath),"Unprotected_" + Path.GetFileName(inputFilePath));

        // Initialize Wrapper for File API operations.
        MIP.Initialize(MipComponent.File);

        // Create ApplicationInfo,setting the clientID from Azure AD App Registration as the ApplicationId.
        ApplicationInfo appInfo = new ApplicationInfo()
        {
            ApplicationId = clientId,ApplicationName = appName,ApplicationVersion = "1.0.0"
        };

        // Instantiate the AuthDelegateImpl object,passing in AppInfo.
        AuthDelegateImplementation authDelegate = new AuthDelegateImplementation(appInfo);

        MipContext mipContext = MIP.CreateMipContext(appInfo,"mip_data",LogLevel.Trace,null,null);

        // Initialize and instantiate the File Profile.
        // Create the FileProfileSettings object.
        // Initialize file profile settings to create/use local state.
        var profileSettings = new FileProfileSettings(mipContext,CacheStorageType.OndiskEncrypted,new ConsentDelegateImplementation());

        // Load the Profile async and wait for the result.
        var fileProfile = Task.Run(async () => await MIP.LoadFileProfileAsync(profileSettings)).Result;

        // Create a FileEnginesettings object,then use that to add an engine to the profile.
        var customSettings = new List<keyvaluePair<string,string>>();
        customSettings.Add(new keyvaluePair<string,string>("enable_msg_file_type","true"));

        // Create a FileEnginesettings object,then use that to add an engine to the profile.
        var enginesettings = new FileEnginesettings("[user@tenant]",authDelegate,"",CultureInfo.CurrentCulture.Name);
        enginesettings.Identity = new Identity("[user@tenant]");

        //set custom settings for the engine
        enginesettings.CustomSettings = customSettings;

        var fileEngine = Task.Run(async () => await fileProfile.AddEngineAsync(enginesettings)).Result; // EXCEPTION THROWN HERE

        var handler = Task.Run(async () => await fileEngine.CreateFileHandlerAsync(inputFilePath,inputFilePath,true)).Result;

        handler.RemoveProtection();

        var result = Task.Run(async () => await handler.CommitAsync(outputFilePath)).Result;
        
        // Application Shutdown
        handler = null; // This will be used in later quick starts.
        fileEngine = null;
        fileProfile = null;
        mipContext = null;

    }
}

但是它会引发以下错误：

nopolicyException：标签策略不包含数据，CorrelationId = 3268dfdf-2ea3-4958-9c72-fe88ae3c6f59，CorrelationId.Description = PolicyProfile，nopolicyError.Category = SyncFile，nopolicyError.Category = SyncFile

var fileEngine = Task.Run(async () => await fileProfile.AddEngineAsync(enginesettings)).Result;

Canyone可以指出我在做什么错吗？

解决方法

您似乎尚未在安全和合规中心（https://security.microsoft.com）中配置或发布标签策略。

对于此用例，您不一定需要发布标签。将此添加到您的引擎设置：

engineSettings.ProtectionOnlyEngine = true;

这将跳过加载策略，并应允许您解密MSG文件。不过，在发布标签政策并删除该设置之前，您将无法阅读或应用标签。