如果您尝试在Windows 11/10上的UWP 应用上使用Microsoft帐户登录时收到错误消息Can't sign in with a Microsoft account with error code 0x8000704ec，那么这篇文章旨在帮助您解决问题用最合适的解决方案。

当您遇到此问题时，您将收到以下完整错误消息；

Can’t sign in with a Microsoft account
This program is blocked by group policy. For more information, contact your system administrator.
0x8000704ec

无法使用Microsoft帐户登录– 错误 0x8000704ec^{(– Error 0x8000704ec)}

如果您遇到此问题，您需要在您的 Windows 10 设备上“允许”Microsoft 帐户。您可以通过以下两种方式之一配置此选项：

1. 本地组策略编辑器
2. 注册表编辑器

让我们看一下与这两种方法相关的过程。

1]通过本地组策略编辑器“允许”Microsoft帐户^{(Local Group Policy Editor)}

请执行下列操作：

• 按Windows key + R调用“运行”对话框。
• 在运行对话框中键入gpedit.msc并按Enter打开组策略编辑器^{(Group Policy Editor)}。
• 在本地组策略编辑器^{(Local Group Policy Editor)}中，使用左窗格导航到以下路径：

Computer Configuration > Windows Settings > Security Settings > Local Polices > Security Options

• 在右侧窗格中，双击帐户：阻止 Microsoft 帐户^{(Accounts: Block Microsoft accounts)} 以编辑其属性。
• 在 本地安全设置^{(Local Security Setting)}选项卡下，单击下拉菜单并选择禁用此策略。^{(This policy is disabled.)}
• 单击应用^(Apply)>确定^(OK)以保存更改。
• 退出组策略编辑器。

对于 Windows 10 Home 用户，您可以添加本地组策略编辑器^{(add Local Group Policy Editor)}功能，然后按照上面提供的说明进行操作，或者您可以执行下面的注册表方法。

2]通过注册表编辑器“允许”Microsoft帐户^{(Registry Editor)}

请执行下列操作：

重要提示^(Important)：由于这是注册表操作，建议您备份注册表^{(back up the registry)} 或 创建系统还原点 作为必要的预防措施。完成后，您可以执行以下操作：

• 按Windows key + R调用“运行”对话框。
• 在“运行”对话框中，键入regedit并按 Enter 以打开注册表编辑器^{(Registry Editor)}。
• 导航或跳转到下面的注册表项路径：

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System

• 在该位置的右窗格中，识别NoConnectedUser键。键值可能设置为1^{( either )}或 3 。
• 现在，双击NoConnectedUser 条目以编辑其属性。
• 在数值^(Value)数据字段中输入0 ，然后⁽⁰⁾按 Enter^(Enter)保存更改。

您现在可以退出注册表编辑器^{(Registry Editor)}并重新启动您的 PC。你现在应该能够登录到你的UWP应用而不会出现错误。

就是这样！

Can’t sign in with a Microsoft account, Error 0x8000704ec on Windows

If when you attempt to sign-in with Microsoft account on UWР apps on Windows 11/10, you receive the errоr message Can’t sign in with a Microsoft account with error code 0x8000704ec, then this post is intended to help you resolve the issue with the most suitable solutions.

When you encounter this issue, you’ll receive the following full error message;

Can’t sign in with a Microsoft account
This program is blocked by group policy. For more information, contact your system administrator.
0x8000704ec

Can’t sign in with a Microsoft account – Error 0x8000704ec

If you’re faced with this issue, you need to ‘Allow’ Microsoft account on your Windows 10 device. You can configure this option in either of two ways viz;

1. Local Group Policy Editor
2. Registry Editor

Let’s take a look at the process involved in relation to both methods.

1] ‘Allow’ Microsoft account via Local Group Policy Editor

Do the following:

• Press Windows key + R to invoke the Run dialog.
• In the Run dialog box type gpedit.msc and hit Enter to open Group Policy Editor.
• Inside the Local Group Policy Editor, use the left pane to navigate to the path below:

Computer Configuration > Windows Settings > Security Settings > Local Polices > Security Options

• On the right pane, double-click on Accounts: Block Microsoft accounts to edit its properties.
• Under Local Security Setting tab, click on the drop-down and select This policy is disabled.
• Click Apply > OK to save the changes.
• Exit Group Policy Editor.

For Windows 10 Home users, you can add Local Group Policy Editor feature and then carry out the instructions as provided above or you can do the registry method below.

2] ‘Allow’ Microsoft account via Registry Editor

Do the following:

Important: Since this is a registry operation, it is recommended that you back up the registry or create a system restore point as necessary precautionary measures. Once done, you can proceed as follows:

• Press Windows key + R to invoke the Run dialog.
• In the Run dialog box, type regedit and hit Enter to open Registry Editor.
• Navigate or jump to the registry key path below:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System

• At the location, on the right pane, identify the NoConnectedUser key. The key value might be set to either 1 or 3.
• Now, double-click the NoConnectedUser entry to edit its properties.
• Input 0 in the Value data field and hit Enter to save the change.

You can now exit Registry Editor and restart your PC. You should now be able to sign in to your UWP apps without the error.

That’s it!

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