About digital signatures and certificates in Office, and buying a digital certificate from a certificate authority or create your own.

Questions and answers about Copilot and how it's used with a Microsoft 365 Personal, Family and Premium subscriptions.

硬件保修 Microsoft 设备或配件附带 Microsoft 提供的有限硬件保修。 条款和条件因国家或地区而异。 保修条款

How to create or edit your Outlook signature for email messages. Include your signature, text, images, electronic business card, and logo.

Note: Your sticky notes may have disappeared under other applications. You cannot currently have Sticky Notes stay on top of other applications. But you can pin Sticky Notes to the Windows taskbar to see your list of notes instantly or to create a new note quickly. Right-click the Sticky Notes icon in the taskbar, and then click Pin to taskbar.

End of servicing Starting June 26, 2025, Windows 11 version 22H2 (Enterprise and Education editions) will no longer receive non-security preview updates. However, monthly security updates will continue through October 14, 2025. After that date, this version will reach the end of servicing and will no longer receive security updates. To stay protected and up to date, we recommend you upgrade to ...

Try these solutions if sent messages in Outlook.com come back with a "delivery failed" error.

送达回执表示您的电子邮件已经送达收件人的邮箱，但不表示收件人已经看到或阅读它。 已读回执表示您的邮件已经被打开。 在 Outlook 中，邮件收件人可以拒绝发送已读回执。 在其他情况下，未发送已读回执，例如收件人的电子邮件程序不支持已读回执。 无法强制收件人发送已读回执。 为正在 ...

手写签名可让你的文档具有个人风格。 你可以扫描你的签名，将其存储为图片，然后在 Word 文档中插入签名。 扫描手写签名并插入手写签名的图片 在纸张上写下您的签名。 扫描该页面并以常见的文件格式将其保存在计算机上：.bmp、.gif、.jpg 或 .png。

如果您對 Xbox Series X|S 或 Xbox One 上的智慧分發運作方式有疑問，請在這裡尋找解答。