To learn about digital signatures (also known as digital ID), what they can be used for, and how to use them in Word, Excel, and PowerPoint, see All about digital signatures. Create a signature line in Word or Excel (desktop) In the document or worksheet, place your pointer where you want to create a signature line. On the Insert tab, select Add a Signature Line in the Text group. In the ...

As used here, “Android user” means a user using Xbox, Game Pass, Xbox Family Settings and Xbox Events for Android, and “iOS/iPadOS user” means a user using Xbox, Game Pass, Xbox Family Settings and Xbox Events for iOS or iPadOS.

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

若要对 Office 文档进行数字签名，必须具有当前 (未过期) 数字证书。 数字证书通常由证书颁发机构 (CA) 颁发，CA 是颁发数字证书供其他方使用的受信任的第三方实体。 有许多商业第三方证书颁发机构可以从中购买数字证书或获取免费数字证书。

在移动设备上，有一些解决方法可以尝试在 Word 中向文档添加签名行。 可以使用下划线键或单个单元格表向Word文档添加签名行。 还可以插入实际签名的图形。 但是，如果不安装加载项，则无法将 数字签名 行添加到移动设备中的Word或 Excel 文件。

Signing your email messages with a digital ID helps to prove your identity and prevent message tampering.

可以通过在空格下划下划线来创建签名行。 执行此操作的最佳方式取决于是打印文档还是在线分发文档。 您可以向文档添加签名行、添加手写签名的图形，或将签名块另存为自动图文集构建基块。

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

If you see error 0x82d60003, you need to use an Xbox-compatible accessory.

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